Sign in
|
English
|
Terms of Use
Dictionary
Forum
Contacts
G
o
o
g
l
e
|
Forvo
|
+
development method with adit
This HTML5 player is not supported by your browser
expl.
平硐开拓法
用平硐对矿体进行开拓的一种方法。通常只要地形允许，利用平硐开拓矿床的全部、大部或局部，多是合理的，因此使用广泛
Add
|
Report an error
|
Get short URL
|
Language Selection Tips
