英语翻译The bottom of the riser is positively secured to the bottom through anchors,which are preceded by wear protection to protect against lateral sliding and the lift-up-and-down of the riser close to the touchdown point.

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英语翻译
The bottom of the riser is positively secured to the
bottom through anchors,which are preceded by wear
protection to protect against lateral sliding and the lift-
up-and-down of the riser close to the touchdown point.

竖井系统的底部通过地锚桩基被确实地固定于底部,在此之前要加以磨损保护,以保护横向的滑动以及竖井系统而接近触地点的升降.