Sign in
|
English
|
Terms of Use
Dictionary
Forum
Contacts
English
⇄
Arabic
Chinese
Dutch
French
German
Russian
Spanish
G
o
o
g
l
e
|
Forvo
|
+
hazard classification system
UN, law, transp.
危险性分类制度
Add
|
Report an error
|
Get short URL
|
Language Selection Tips