Sign in
|
English
|
Terms of Use
Dictionary
Forum
Contacts
English
⇄
Chinese
G
o
o
g
l
e
|
Forvo
|
+
A&B leads
telecom.
A 线和 B 线
四线制电路每一线对所跨线圈的中心抽头线，用来传送 E&M 信令
Add
|
Report an error
|
Get short URL
|
Language Selection Tips
