Sign in
|
English
|
Terms of Use
Dictionary
Forum
Contacts
G
o
o
g
l
e
|
Forvo
|
+
vertical reference line
This HTML5 player is not supported by your browser
avia.
垂直参考
基准
线
geophys.
垂直基准线
tech.
垂直角的基准线
Add
|
Report an error
|
Get short URL
|
Language Selection Tips
