Sign in
|
English
|
Terms of Use
Dictionary
Forum
Contacts
Chinese
⇄
English
G
o
o
g
l
e
|
Forvo
|
+
ABC 三级分类法
space
ABC classification
(将备件按其重要性划分为A、B、C三类)
Add
|
Report an error
|
Get short URL
|
Language Selection Tips
