pretension anchor meaning in English

预抛锚

It is used to drill heavy duty pretension anchor holes at side slope of water power station , railway or highway projects , as well as drainage holes
适用于水电站铁路公路边坡大吨位预应力锚固孔排水孔的施工，以及预防滑坡岩石坍塌等地质灾害治理工程。
It is applied to drill heavy duty pretension anchor holes at side slope of water power station , railway or highway projects , to drill drainage holes and grouting pile holes on roof of tunnel gallery
适用于水电站铁路公路边坡大吨位预应力锚固孔排水孔隧道口管棚孔的施工，以及预防滑坡岩石坍塌等地质灾害治理工程。
Yg - 80a construction drilling rig is a full hydraulic operated top drive power head drill . it is used to drill heavy duty pretension anchor hole at side slope of water power station , railway or highway projects , as well as drainage holes
Yg - 80a型锚固工程钻机是在yg - 80钻机基础上研制的，科学分配钻机性能参数，使钻机更适合岩石潜孔锤钻进跟管钻进，同时兼顾土层合金回转钻进螺旋钻进工艺。