Sign in
|
English
|
Terms of Use
Dictionary
Forum
Contacts
Chinese
⇄
English
G
o
o
g
l
e
|
Forvo
|
+
复煤层
tech.
composite coal seam
复煤层
全层厚度较大,夹矸层数多,厚度和岩性变化大,夹矸的分层厚度在一定范围内可能大于所规定的煤层最低可采厚度的煤层
expl.
composite seam
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