Sign in
|
English
|
Terms of Use
Dictionary
Forum
Contacts
English
⇄
Chinese
G
o
o
g
l
e
|
Forvo
|
+
index of roof strength
expl.
顶板强度指数
根据岩石单向抗压强度、节理裂隙影响系数、分层厚度影响系数三项指标确定的长壁工作面顶板强度指数
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