well hole meaning in English

井道孔
升降机井道

A new method to obtain the parameters of an elevator well hole
一种获取电梯井道参数的新方法
It is made of excellent high poly - mer and other materials better holeing perfprmance . it can be decreased the sleeve difference to increace , the tight sternght and prevent cots from separating j in bearing
微套差不处理胶辊内层采用高分子材料，使胶辊外层保持原来的自然状态无任何变形应力，可重复套制。
The engineering drilling machine of kp2200 type is double layers bottom plate , and drives through hydraulic pressure , upper plate can move fore and aft on the lower plate , the drill power leans back under the action of oil cylinder , the lower plate can put the drilling tool within 2 . 5 meters into well hole without moving , it is convenient and reliable , and ensures construction quality
Kp2200型工程钻机为双层底盘，通过液压驱动，上盘可在下盘上前后移动，钻塔在油缸的作用下后仰，下盘不动即可把2 . 2米以内的钻具放入井孔内，方便可靠，保证施工质量。