Sign in
|
English
|
Terms of Use
Dictionary
Forum
Contacts
English
⇄
Chinese
G
o
o
g
l
e
|
Forvo
|
+
combination-system of drilling
expl.
冲击-回转钻进
钻头在孔底回转的同时,还通过一定的装置向其施加冲击力,以破碎岩石的钻进
combination system of drilling
dril.
旋转钻和顿钻
混合钻井法
oil
混合钻井法
The server is undergoing maintenance and the site is working in read-only mode. Please check back later.">
Add
|
The server is undergoing maintenance and the site is working in read-only mode. Please check back later.">
Report an error
|
Get short URL
|
Language Selection Tips