这最后的操作叫“拖管”，它使管道就位于河床下面。
This final operation is the"pullback"and installs the line pipe under the river.
深海采矿扬矿管处于海洋环境之中，受海浪、海流以及采矿船拖航的影响，会发生大的偏移。
Deep ocean mining pipe has a large deflective displacement under the wave, currents and dragging by mining vessel in ocean environment.
在水平定向钻穿越管道回拖环节中，容易出现卡管现象，导致穿越失败，造成巨大的经济损失。
Pipe sticking phenomenon appears sometimes during pull-back stage of pipeline crossing with horizontally directional drilling, which results in crossing failure and great economic loss.
为了解决回拖卡管问题，动态注水平衡技术应运而生。
In order to solve this problem, the dynamic water injection balance technique is developed.
把管子拖在地上搬运时要注意不使管的外部损伤。
Make sure not to get any pipes surface hurt when carrying on groud.
他们的第一个产品，管跳转，是一个针对小型企业的销售产品，其创建道内容和形式，都是通过拖和独特的下降减少接口应用。
Their first product, PipeJump, is a sales tracking application for small businesses, which creates a unique interface through reduction of form elements and drag-and-drops.
他们的第一个产品，管跳转，是一个针对小型企业的销售产品，其创建道内容和形式，都是通过拖和独特的下降减少接口应用。
Their first product, PipeJump, is a sales tracking application for small businesses, which creates a unique interface through reduction of form elements and drag-and-drops.
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