Sign in
|
English
|
Terms of Use
Dictionary
Forum
Contacts
English
⇄
Chinese
G
o
o
g
l
e
|
Forvo
|
+
direct circulation flushing
expl.
正循环冲洗
冲洗液从钻具内孔输人孔底,然后携带岩屑〈粉〉从钻具与孔壁之间的环形空隙返回地表的冲洗方法
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