DictionaryForumContacts

   English
Google | Forvo | +
to phrases
percussion boring
construct. 冲击钻探〔孔〕
eng.geol. 冲击钻探; 冲击打眼
expl. 冲击钻进钻头在一定装置作用下,利用钻具自重,在一定冲程高度内,周期性地对孔底进行冲击,以破碎岩石的钻进
hydroel.st. 冲击钻孔
tech. 撞钻; 冲击钻进; 冲击式钻探; 冲击钢索钻; 冲击钻採
percussion boring: 27 phrases in 7 subjects
Bridge construction2
Drilling1
Ecology1
Engineering geology8
Oil / petroleum1
Technology13
Water resources1