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Thebottomoftheriserispositivelysecuredtothebottomthroughanchors,whichareprecededbywearprotection

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.
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.

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.