Sign in
|
English
|
Terms of Use
Dictionary
Forum
Contacts
English
⇄
Chinese
G
o
o
g
l
e
|
Forvo
|
+
smooth tooth action
dril.
齿轮平稳啮合
oil
平稳齿轮啮合
Add
|
Report an error
|
Get short URL
|
Language Selection Tips
