Sign in
|
English
|
Terms of Use
Dictionary
Forum
Contacts
Chinese
⇄
English
G
o
o
g
l
e
|
Forvo
|
+
人工保护盘
为保证井筒延深作业的安全,在原生产井筒的井窝内构筑的、阻挡坠落物的临时结构物
expl.
protective bulkhead
;
manmade safety staging
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