Sign in
|
English
|
Terms of Use
Dictionary
Forum
Contacts
English
⇄
Chinese
+
G
o
o
g
l
e
|
Forvo
|
+
pillar supporting method
This HTML5 player is not supported by your browser
expl.
煤柱支撑法
在采空区中留适当宽度煤柱以支撑顶板的岩层控制方法
mineral.
★
煤柱支撑法
Add
|
Report an error
|
Get short URL
