Sign in
|
English
|
Terms of Use
Dictionary
Forum
Contacts
Chinese
⇄
English
G
o
o
g
l
e
|
Forvo
|
+
to phrases
坚硬地层
dril.
competent bed
;
competent formation
hydroel.st.
firm bottom
oil
hard formation
tech.
hardest formation
坚 硬 地层
:
2 phrases
in 1 subject
Drilling
2
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