Skip to main content

An expert group of engineers, including Cornell Engineering Dean Lance Collins and Professor Tom O'Rourke, tour the Canarsie Tunnel. A benchwall lines the tunnel on the right.

avgoapp官网

While speaking at an event in early December, Lance Collins, the Joseph Silbert Dean of Engineering, noticed his phone receiving an unusual number of messages. He continued his speech, not knowing until later that he was being contacted on behalf of New York Gov. Andrew Cuomo for a special project.

The governor wanted to ask Collins some questions regarding New York City’s Canarsie Tunnel, a vital underwater subway path connecting Manhattan to Brooklyn. Flooding from Superstorm Sandy in 2012 had badly damaged the century-old tunnel, which was set to close for 15 months of repairs beginning in April. The shutdown of the tunnel’s L train service was so dreaded by commuters in New York that some had dubbed it “L-pocalypse.”

Professor Tom O'Rourke, left, speaks with N.Y. Gov. Andrew Cuomo during a tour of the Canarsie Tunnel on Dec. 14.

But thanks to Ivy League ingenuity – and engineering – there’s a good chance “L-pocalypse” won’t befall the Big Apple. What began with a few questions resulted in an entirely new plan to avert the shutdown, and perhaps a new model for how major infrastructure projects can be evaluated.

Assessing the problem

Collins and Cuomo were joined on a conference call by a number of officials and engineers, including Tom O’Rourke, the Thomas R. Briggs professor of civil and environment engineering with expertise in underground infrastructure and transportation systems.

“Cuomo said he wanted a fresh set of eyes to look at the tunnel plan. He wanted us to see if we thought it was the best way forward or if we had any alternative ideas that might help keep the tunnel operational,” said Collins.

冈本视频app下载污

The group discussed the work that needed to be done to the tunnel, parts of which were beginning to erode from the salt water that had flooded it six years earlier. Its concrete benchwall – a 2-foot-wide walkway stretching the length of the tunnel – was deteriorating in some areas, endangering the track and exposing the power and signal cables encased within.

Soon after the call, Collins and O’Rourke received a detailed analysis of the tunnel and its proposed rehabilitation plan. After an in-depth review of the report, they were asked to join a midnight tour of the tunnel with Cuomo and engineering professors from Columbia University, including Mary Boyce, the dean of the Fu Foundation School of Engineering and Applied Science.

With flashlights, hardhats and other protective gear, the team descended into the tunnel during the early morning hours of Dec. 14. They observed that while some areas of the benchwall remained intact, others had begun to crumble. In other areas, the benchwall had acted as a sponge, absorbing salt water that, in turn, was corroding the cables inside.

Collins described the tour as informative and an exhilarating experience for the engineering team. He added that Cuomo was equally engaged.

“I was amazed by the command the governor had of the details regarding the tunnel,” said Collins. “If you think about everything it takes to run a state government, you wouldn’t think he could have this level of understanding. It was impressive.”

The team emerged later that night, galvanized and ready to dig deeper.

In 2012, Hurricane Sandy filled the Canarsie Tunnel with salt water, from the Avenue D Fan Plant to the North 7th Street Fan Plant.

Proposing a new solution

The Cornell and Columbia engineers began examining different rehabilitation options. They worked collaboratively through winter break, mostly in New York City so they could exchange ideas and begin to piece together an alternative proposal to the existing rehabilitation plan. They toured the Hudson River Tunnel, consulted extensively with officials from the Metropolitan Transportation Authority (MTA) and Amtrak, peppered consultants with questions, and studied state-of-the-art rail tunnels in other big cities, including Hong Kong, London and Riyadh.

The end result: a proposal to renovate the Canarsie Tunnel while keeping it operational, safe, on time and on budget. Night and weekend closures would be required, but only one of the tunnel’s two tracks would close at a time, allowing for continuous service.

“This is really a unique design, a unique system,” Cuomo said as he announced the new proposal during a Jan. 3 press conference. “It’s faster, it’s cheaper, it’s better than the way we’ve been doing it now.”

“Technology is typically advanced through the integration of existing innovations as opposed to the invention of something completely new from whole cloth.”

Lance Collins, the Joseph Silbert Dean of Engineering at Cornell

Instead of replacing miles of cables inside the benchwall, as the original plan had proposed, a racking system would suspend new cables on the side of the tunnel. This would allow the existing cables to continue powering the train while new cables are installed and jacketed in fireproof material. And instead of laboriously replacing 32,000 feet of benchwall, the plan proposes the wall remain where structurally stable and be fortified with fiber-reinforced polymer wrap where needed.

The racking system has been used in the construction of modern subway tunnels and the fireproof material is used in the airline industry, but neither has been applied to a rehabilitation project of this kind, according to Collins, who said the fiber-reinforced polymer wrap is also a proven technology borrowed from other infrastructure projects.

“It’s used today to hold together pillars of bridges that were damaged in earthquakes,” Collins said. “That is a far more structurally challenging environment than a benchwall. We’re simply using it for a very different application.”

To monitor the Canarsie Tunnel’s interior, “smart” fiber-optic sensor cables would run along the remaining benchwall to detect small shifts or cracks. Like the other technologies, it has proven effective in projects outside of the U.S., and has even been tested in O’Rourke’s Cornell laboratory.

O’Rourke said data gained from the fiber-optic cables would allow engineers to learn more about the Canarsie Tunnel’s condition than previously possible.

“The fiber optics and other proposed sensors allow us to create a ‘smart’ tunnel that can detect very small levels of deformation and changes in structural integrity before there is serious loss of capacity in the system,” said O’Rourke, who added the plan also calls for a complementary high-resolution LiDAR system – a laser detection technology – to periodically map the surface of the tunnel and monitor it for deterioration.

An opportunity to lead the country

Collins said he is genuinely impressed with the original rehabilitation plan and emphasized that the new proposal could not have been conceived without the comprehensive work that had already been done. But he added that letting a group of outside experts re-examine the plan and “kick the tires” was an excellent idea that could be replicated in the future.

“I see this as a case study of how major infrastructure projects could be done,” said Collins, who noted that academia is a good place to find experts with knowledge of emerging technology and outside-the-box thinking.

An expert panel, including Columbia Engineering Dean Mary Boyce, left, and Cornell Engineering Dean Lance Collins, presents recommendations Jan. 3 for the Canarsie Tunnel rehabilitation project.

“Technology is typically advanced through the integration of existing innovations as opposed to the invention of something completely new from whole cloth,” said Collins, “and that’s what we were able to do, come up with a creative solution that weaves proven technologies into an integrated system.”

O’Rourke pointed out that rehabilitating the tunnel with smart sensor technology provides an enormous opportunity for New York agencies and engineering firms to partner with universities and assume a leadership role in developing intelligent infrastructure.

“This shifts the paradigm from current practice to construction empowered by distributed sensors and artificial intelligence,” O’Rourke said. “It can be an important step forward as the nation faces the challenge of addressing its aging infrastructure and bringing service and resources more effectively to the people, not only in New York, but across the United States.”

City officials hope renovations can begin sometime around April, as originally planned, but this time with the L train remaining in service.

Syl Kacapyr is public relations and content manager for the College of Engineering.

Watch highlights from the governor's Jan. 3 press conference.

玉门福公吉设备有限公司

洪湖伟春公贸易有限公司

七台河寿亚隆有限公司

花姿app官网 西瓜直播app下载污 水仙直播app下载iOS 盘他直播app下载iOS 依恋直播app官网 大秀直播app官网 直播盒子app官网 啪嗒视频app下载污 菠萝菠萝蜜视频app下载iOS 粉色视频app官网 野花视频app官网 茶馆视频app官网 啪嗒视频app下载iOS 花姿直播app下载iOS 趣播app下载污 丝瓜视频app下载iOS 成人直播app下载污 盘她直播app下载iOS 小草视频app官网 丝瓜视频污app官网 小v视频app下载iOS 含羞草视频app下载iOS 心上人直播app下载iOS 美梦视频app官网 荔枝视频app下载iOS Huluwaapp官网 月亮直播app官网 富二代f2抖音app下载iOS 盘她直播app下载污 香蕉直播app下载iOS 草榴直播app下载iOS 米老鼠直播app下载污 7秒鱼直播app官网 成版人音色短视频app官网 蝴蝶直播app官网 朵朵直播app下载污 小奶猫app下载iOS 宅男之家app官网 探花直播app下载iOS 蘑菇视频app下载iOS 雨燕直播app下载iOS 豆奶短视频app下载iOS 91香蕉视频app官网 猛虎直播app下载污 麻豆传媒映画app官网 本色视频app官网 JOJO直播app官网 冈本app下载iOS 卖肉直播app下载污 快播破解app下载污 性直播app官网 麻豆传媒app官网 美岁直播app下载iOS 年轻人片app下载iOS 樱花app下载iOS 草莓视频app下载污 四虎app官网 香蜜直播app下载污 音色短视频app官网 Kitty直播app官网 快狐app官网 小怪兽直播app下载污 茄子app下载污 黄瓜直播app下载iOS 小可爱app下载iOS 花狐狸直播app下载污 玉米视频app下载iOS AVBOBOapp下载iOS 猫咪视频app下载iOS 秀色小抖音app下载iOS 探花直播app下载污 雨燕直播app下载iOS 台湾swagapp下载iOS 九尾狐视频app官网 快猫视频app下载污 冈本app下载iOS 成人直播app下载iOS 卡哇伊直播app官网 health2app官网 盘她直播app下载iOS 蝴蝶直播app下载iOS 樱花app官网 丝瓜视频污app官网 红高粱直播app官网 心上人直播app官网 抖阴视频app下载iOS 蝶恋花直播app官网 久草视频app下载iOS 七秒鱼app官网 樱花直播app下载iOS 泡芙视频app下载iOS 月光直播app下载污 红娘直播app官网 硬汉视频app下载iOS 花秀神器app官网 小怪兽直播app下载污 恋夜秀场app下载iOS 猫咪视频app下载污 荔枝视频app下载iOS 咪咪直播app下载污 麻豆视频app下载污 草莓app下载污 云上花直播app官网 米老鼠直播app官网 成版人快手app下载污 佳丽直播app下载污 米老鼠直播app下载iOS 美岁直播app下载污 芭乐app下载iOS 樱花直播app下载iOS 花椒直播app官网 9uuapp官网 麻豆传媒视频app下载污 套路直播app下载iOS 妖妖直播app下载污 向日葵视频app官网 成版人抖音app下载iOS 橙子直播app下载iOS 草榴短视频app下载污 葫芦娃视频app下载污 小蝌蚪app下载iOS 黄瓜视频人app官网 粉色app下载污 陌秀直播app官网 月色直播app下载iOS 7秒鱼直播app下载iOS 比心直播app下载iOS 夜遇直播号app下载污 91香蕉app下载iOS JAV名优馆app下载手机版 成版人短视频app官网 水晶直播app下载iOS 卡哇伊直播app下载iOS bobo直播app官网 麻豆视频app下载污 陌秀直播app下载污 小怪兽直播app官网 葫芦娃app官网 套路直播app官网 蜜桃直播app官网 夜魅直播app官网 蓝颜app官网 千层浪app下载污 芭乐app下载iOS 芭乐app下载污 成版人快手app下载iOS 恋人直播app下载iOS JAV名优馆app官网 月夜直播app官网 Avboboapp下载iOS 番茄直播app官网 花姬直播app官网 盘她s直播app下载iOS 花姿app下载iOS 咪咪直播app官网 成版人茄子视频app下载iOS 米老鼠直播app官网 小喵直播app下载iOS 米老鼠直播app下载污 小酒窝直播app下载污 富二代f2抖音app下载污 葡萄视频app下载污 初恋视频app官网 彩色直播app官网 望月直播app官网 黄瓜app下载污 望月app下载iOS 花椒直播app官网 盘他app官网 金屋藏娇直播间app官网 媚妹秀app下载iOS 骚虎直播app官网 猫咪视频app下载污 丝瓜草莓视频app官网 菠萝蜜app官网 麻豆传媒直播app下载污 烟花巷app官网 恋夜秀场app官网 AVnightapp下载污 水晶直播app下载污 小花螺直播app下载污 卡哇伊app下载iOS 么么直播app下载污 烟花巷app下载污 遇见直播app下载污 茄子app官网 丝瓜视频污app下载iOS 小公主直播app下载污 红玫瑰直播app下载iOS 丝瓜视频app官网 皮卡丘直播app下载iOS 豆奶抖音短视频app官网 草莓app官网 小怪兽app下载iOS 豆奶短视频app下载污 享爱app官网 6房间视频直播app下载污 含羞草视频app下载iOS 成人直播app下载污 花秀神器app官网 最污直播app下载iOS 棉花糖直播app下载iOS 云上花直播app下载iOS 水晶直播app下载iOS 成版人抖音app下载iOS 小公主直播app官网 春水堂视频app官网 桃花app下载iOS 向日葵app下载iOS 菠萝蜜视频app官网 91香蕉视频app下载iOS 7秒鱼直播app官网 咪咪直播app下载iOS 橙子直播app下载iOS 快播破解app官网 富二代app下载iOS 花心视频app下载污 含羞草实验研究所app下载污 恋夜秀场app下载iOS 豌豆直播app下载污 盘他直播app官网 合欢视频app下载污 蜜柚直播app下载iOS 秀儿直播app官网 BB直播app下载iOS 污直播app下载污 小奶狗视频app官网 啪嗒视频app下载污 MM直播app下载iOS 妖妖直播app官网 金屋藏娇直播间app下载iOS 91直播app下载iOS 荔枝视频app下载污 快喵app下载iOS 十里桃花直播app官网 小草莓app下载污 妖妖直播app官网 91视频app下载iOS 樱桃直播app下载iOS 青青草app下载污 秀儿直播app下载iOS 蜜桃app下载iOS 大菠萝app下载污 雨云直播app下载iOS 春水堂app下载iOS 月亮视频app官网 豆奶视频app下载污 骚虎直播app下载污 AVBOBOapp官网 佳丽直播视频app下载iOS 9uuapp下载污 套路直播app官网 桃花app下载iOS 合欢视频app官网 樱花app下载污 水晶直播app官网 夜猫视频app下载iOS 玉米视频app下载iOS 番茄社区app官网 免费黃色直播app下载iOS 橘子视频app官网 花心视频app下载iOS 鸭脖视频app下载污 梦幻直播app官网 蜜桃直播app下载污 成版人茄子视频app下载污 兔子直播app下载iOS Avnightapp下载iOS 夜狼直播app下载污 芭乐app下载iOS 葫芦娃app下载污 菠萝菠萝蜜视频app官网 米老鼠直播app官网 樱花视频app下载iOS 媚妹秀app官网 猫咪软件app下载iOS 蜜柚app官网 春水堂app下载污 男人本色西瓜视频app下载iOS 猛虎直播app下载iOS 水晶直播app下载iOS 污软件app官网 小喵直播app下载污 快播破解app下载污 主播福利app下载iOS 荔枝视频app下载iOS 成人快手app下载iOS 黄瓜视频app官网 花心直播app官网 91香蕉视频app下载iOS 夏娃直播app官网 夜魅直播app下载iOS 火辣直播app官网 红颜app下载污 草莓视频app官网 草鱼app下载污 swag台湾app下载iOS 初恋直播app下载iOS 咪咪直播app下载污 九尾狐直播app下载iOS 69视频app官网 美岁直播app下载污 月亮视频app下载污 香草成视频人app下载iOS 梦幻直播app官网 食色短视频app官网 遇见直播app下载污 水蜜桃app下载iOS 微啪app官网 套路直播app官网 泡芙短视频app下载iOS 丝瓜视频污app下载污 皮卡丘直播app下载污 秋葵视频app下载iOS 蜜橙视频app下载iOS 七仙女直播app下载污 烟花直播app下载iOS 月光宝盒直播app下载iOS 烟花巷直播app下载iOS 本色视频app官网 小小影视app下载污 麻豆传媒视频app下载iOS 彩云直播app下载iOS 云雨直播app官网 花粥直播app下载污 啪嗒视频app下载iOS 九尾狐直播app下载污 泡芙视频app下载iOS 红高粱直播app下载污 小草莓app官网 月色直播app下载污 男人本色西瓜视频app下载污 鸭脖视频app下载污 小奶狗视频app官网 七秒鱼app下载iOS 麻豆传媒直播app下载iOS 骚虎直播app下载iOS 欢喜视频app下载iOS BB直播app官网 橙子直播app下载污 福利直播app下载iOS 享爱app下载iOS 媚妹秀app下载iOS 主播大秀app官网 铁牛视频app下载污 性福宝app下载污 菠萝蜜视频app下载iOS 茄子直播app下载iOS 快猫视频app下载污 合欢视频app下载iOS 荔枝app官网 棉花糖直播app官网 探花直播app下载污 d2天堂app下载iOS 杏趣直播app官网 内裤直播app下载iOS 樱桃视频app下载iOS 彩色直播app官网 恋人直播app下载iOS 69视频app官网 铁牛视频app下载iOS 套路直播app下载iOS 成版人茄子视频app下载iOS 梦幻直播app下载污 泡泡直播app下载污 快喵app官网 水晶直播app官网 香蕉app官网 蝶恋花app下载污 九尾狐直播app下载污 黄瓜视频人app官网 花姬直播app下载污 富二代f2抖音app下载iOS Huluwaapp下载iOS 成版人快手app官网 米老鼠直播app下载iOS 微啪app官网 草鱼app官网 JAV名优馆app官网 鸭脖视频app下载iOS 麻豆传媒直播app官网 91香蕉视频app下载iOS 猫咪视频app官网 水晶直播app下载iOS 好嗨哟直播app官网 香蕉视频app下载iOS 黄页荔枝app下载iOS 食色app官网 牛牛视频app下载污 浪浪视频app下载iOS 葡萄视频app下载污 小小影视app官网 火爆社区app下载iOS 野花视频app官网 九尾狐视频app下载污 乐购直播app下载污 比心直播app下载iOS 鸭脖视频app官网 橘子直播app下载污 小仙女app官网 黄页荔枝app下载污 草莓直播app下载iOS 男人本色西瓜视频app下载污 蚪音app官网 享受直播app下载iOS 荔枝视频app下载iOS 麻豆传媒直播app官网 小怪兽app官网 黄瓜视频人app下载iOS 盘她s直播app下载污 富二代app下载iOS 樱花app下载污 浪浪视频app官网 盘她s直播app下载iOS 樱花app下载iOS 樱花app下载污 久草app官网 青青草app下载污 JAV名优馆app官网 d2天堂app官网 豆奶短视频app下载iOS 泡泡直播app下载污 A头条app下载iOS 主播福利app下载污 暖暖直播app官网 九尾狐视频app下载iOS 芭乐app官网 小奶猫app下载污 荔枝app下载iOS 花姬app下载iOS 雨燕直播app官网 彩云直播app下载污 秀色小抖音app下载iOS 么么直播app官网 红楼直播app下载污 性福宝app官网 含羞草视频app下载iOS 快播破解app下载污 红楼直播app官网 iAVBOBOapp下载iOS 抖阴视频app下载iOS 黄瓜app官网 陌秀直播app下载iOS 大番号app官网 红高粱直播app官网 香蕉视频app下载iOS 主播大秀app下载iOS 杏吧直播app下载污 快猫视频app下载iOS 灭火卫视app官网 蜜蜂视频app下载污 快猫视频app下载污 内裤直播app下载iOS 梦幻直播app下载iOS 夜夜直播app下载污 s8视频app官网 圣女直播app下载iOS 性福宝app下载污 微杏app官网 比心app官网 柚子直播app下载污 花椒直播app下载污 初见直播app下载iOS 食色app官网 雨燕直播app下载污 麻豆视频app下载iOS 花心app下载iOS 烟花巷app下载iOS 小米粒直播app下载手机版 樱花视频app官网 玉米视频app下载iOS 梦鹿直播app下载iOS BB直播app官网 橘子直播app官网 ML聚合app下载手机版 主播福利app下载污 麻豆传媒app下载iOS 蜜桃直播app官网 奶茶视频app官网 左手视频app官网 午夜直播间app下载iOS 夜夜直播app下载iOS 草莓直播app下载污 小姐姐直播app下载污 成版人短视频app下载iOS 丝瓜app官网 夜狼直播app下载iOS ML聚合直播app下载手机版 乐购直播app下载iOS 黄页荔枝app下载iOS 合欢视频app官网 本色视频app下载iOS 葫芦娃app下载iOS 蜜橙视频app下载污 丝瓜app下载iOS 么么直播app官网 幸福宝app下载iOS 小宝贝直播app下载iOS 黄瓜直播app下载污 成人快手app下载污 柠檬直播app官网 音色短视频app下载iOS 欢喜视频app官网 成版人抖音app下载iOS 比心app下载污 啪嗒视频app官网 青草视频app下载污 粉色视频app下载污 趣播app下载污 春水堂app下载iOS 媚妹秀app下载污 蜜蜂视频app下载iOS 富二代app下载iOS 微杏app下载iOS 成人直播app下载污 主播福利app下载iOS 烟花巷直播app下载iOS 小公主直播app官网 名优馆app下载污 后宫视频app下载iOS 遇见直播app官网 骚虎直播app官网 宅男之家app下载污 鲍鱼视频app下载iOS 红楼直播app下载iOS 小猪视频app官网 卖肉直播app下载iOS 棉花糖直播app下载污 恋人直播app下载污 草榴视频app官网 草榴视频app官网 MM直播app下载手机版 梦露直播app下载污 笔芯直播app下载污 月色直播app官网 彩云直播app官网 蜜橙视频app官网 蝶恋花app官网 蓝精灵直播app下载iOS 么么直播app下载iOS 比心直播app下载污 嘿嘿连载app下载iOS 红高粱直播app下载污 香蕉直播app下载污 花心视频app下载iOS 麻豆传媒视频app下载污 大菠萝app下载iOS 泡芙视频app下载污 七秒鱼直播app下载iOS 蜜蜂视频app下载iOS 红玫瑰直播app下载iOS ML聚合app下载iOS 樱花app下载iOS Huluwaapp下载iOS 爱爱视频app下载iOS 蜜蜂视频app官网 花样视频app下载iOS 富二代app官网 黄瓜app下载污 夜魅直播app官网 香蜜直播app官网 青青草app下载iOS 草榴视频app官网 棉花糖直播app下载iOS A头条app下载污 荔枝视频app下载iOS 成版人音色短视频app下载iOS 小狐仙直播app下载污 抖阴直播app官网 西瓜直播app下载污 盘她app官网 快猫app下载iOS 9uuapp官网 蓝颜app官网 黄鱼视频app官网 午夜直播app官网 富二代f2短视频app下载污 遇见直播app下载iOS 小米粒直播app下载手机版 小草莓app下载iOS 成版人音色短视频app下载iOS 彩色直播app下载iOS 7秒鱼直播app官网 合欢视频app下载iOS 金屋藏娇直播间app官网 恋夜秀场app下载iOS 探探直播app官网 水晶直播app下载iOS 佳丽直播视频app下载污 91直播app官网 蓝颜app下载iOS 小米粒直播app官网 初见直播app下载污 成人快手app下载污 粉色视频app下载污 青青草app下载污 性直播app官网 樱花视频app下载iOS 葫芦娃视频app下载污 七秒鱼直播app下载iOS 荔枝视频app下载污 月夜直播app下载iOS 含羞草实验研究所app官网 牛牛视频app官网 水晶直播app官网 欢喜视频app下载iOS 乐购直播app下载iOS 成版人音色短视频app官网 夜狼直播app下载iOS d2天堂app下载污 金鱼直播app下载iOS 蝶恋花app下载污 快狐短视频app下载iOS 男人本色西瓜视频app官网 含羞草视频app下载污 快猫视频app下载iOS 香蜜直播app下载污 BB直播app下载iOS 大西瓜视频app下载iOS 可乐视频app官网 千层浪视频app官网 野花视频app官网 七秒鱼app官网 iavboboapp官网 九尾狐视频app下载iOS 水晶直播app官网 豌豆直播app下载iOS 最污直播app下载iOS 红娘直播app官网 水蜜桃app下载iOS 千层浪app下载iOS 桃花直播app官网 咪哒直播app下载污 食色app下载污 樱花app下载污 米老鼠直播app下载iOS 繁花直播app官网 番茄社区app官网 猛虎视频app下载iOS 黄页荔枝app下载iOS 樱花app下载iOS 葫芦娃视频app官网 9uuapp下载iOS 富二代短视频app官网 可乐视频app官网 蜜桃app下载iOS 菠萝蜜app官网 考拉直播app下载污 猫咪软件app下载iOS f2富二代app下载iOS 小奶猫app官网 七仙女直播app下载污 麻豆传媒映画app下载污 97豆奶视频app下载iOS 咪哒app官网 性直播app下载污 爱爱视频app下载污 avgoapp下载iOS JAV名优馆app下载手机版 快猫视频app下载污 蜜桃直播app下载污 小狐仙直播app下载iOS 橘子直播app官网 尤蜜app下载iOS 火辣直播app官网 薰衣草直播app官网 月光宝盒直播app下载污 恋夜秀场app官网 含羞草app下载iOS 樱桃app下载污 橙子视频app下载污 九尾狐视频app下载污 香蕉视频app下载污 快猫短视频app下载iOS 蜜蜂视频app官网 桃花直播app下载iOS 咪咪直播app官网 迷雾直播app下载iOS 木瓜视频app下载iOS 樱花直播app官网 豆奶app官网 盘她app下载污 快猫app官网 红娘直播app下载污 蜜柚直播app下载iOS d2天堂app官网 暗夜直播app下载iOS 樱桃视频app下载污 小狐仙视频app下载污 九尾狐直播app官网 一对一直播app下载污 朵朵直播app官网 梦鹿直播app官网 快猫短视频app官网 橙子视频app下载iOS 泡芙app下载iOS JAV名优馆app官网 污直播app下载污 逗趣直播app官网 小怪兽直播app下载污 名优馆app下载iOS 陌秀直播app官网 小猪视频app官网 番茄社区app官网 四虎app下载iOS 盘他app下载污 恋夜秀场app下载iOS 黄瓜app下载污 swag视频app下载iOS 媚妹秀app下载iOS 黄鱼视频app下载iOS 烟花直播app下载iOS 米老鼠直播app下载iOS 花心社区app下载iOS 梦鹿直播app下载污 梦幻直播app下载污 薰衣草直播app官网 盘她s直播app下载污 污直播app下载iOS 蜜蜂视频app下载iOS 初恋视频app下载污 云雨直播app下载污 香蕉直播app下载iOS 黄页荔枝app下载iOS 米老鼠直播app官网 猫咪软件app下载污 橘子视频app下载污 午夜神器app官网 含羞草app下载iOS 暖暖直播app下载污 陌秀直播app下载污 A头条app下载污 望月直播app下载iOS 柠檬直播app下载iOS 豆奶app官网 柠檬视频app下载污 野花视频app官网 成人快手app官网 嘿嘿连载app下载iOS 成版人快手app下载污 小姐姐直播app官网 快猫短视频app官网 逗趣直播app官网 花狐狸直播app下载iOS 冈本app下载iOS Huluwaapp下载污 樱桃直播app下载污 香草视频app官网 小奶猫app下载iOS 夜狼直播app下载iOS 香草视频app下载iOS 69热app官网 富二代f2短视频app官网 樱花视频app下载iOS 向日葵视频app下载iOS 成版人抖音富二代app下载iOS 佳丽直播视频app下载污 d2天堂app下载iOS 猫咪视频app下载污 萝卜视频app官网 大西瓜视频app官网 萝卜视频app官网 小狐仙直播app下载污 彩色直播app下载污 蜜蜂视频app下载iOS 成版人茄子视频app官网 月光直播app下载iOS 快喵app下载iOS 内裤直播app下载污 小怪兽直播app下载污 Huluwaapp下载iOS 盘他直播app官网 成版人音色短视频app下载iOS 榴莲视频app官网 小奶狗app官网 小米粒直播app下载手机版 小花螺直播app下载污 灭火卫视app官网 七仙女直播app官网 免费黃色直播app官网 依恋直播app下载污 美岁直播app下载污 黄瓜视频人app下载污 丝瓜视频污app下载污 丝瓜草莓视频app下载iOS 花样视频app官网 千层浪直播app官网 lutubeapp下载手机版 7秒鱼app下载iOS 黄瓜视频人app下载iOS fi11含羞草app下载iOS 夜狼直播app下载污 大象视频app官网 乐购直播app下载污 橙子视频app下载污 性福宝app官网 咪哒app官网 荔枝app官网 奶茶视频app官网 大秀直播app下载污 蜜桃app下载污 麻豆传媒直播app下载iOS 猫咪软件app下载污 番茄社区app下载iOS 小优app下载iOS JAV名优馆app官网