Sign in
|
English
|
Terms of Use
Dictionary
Forum
Contacts
Chinese
⇄
English
G
o
o
g
l
e
|
Forvo
|
+
to phrases
主表面
avia.
primary surface
(有关跑道的纵向居中的矩形面。它的宽度是可变的,当跑道有特别准备的硬表面时,它通常都在每一个跑道端外延伸200 ft (60m )。而当跑道没有特别准备的或计划的硬表面时,主表面就在跑道的每一端结束。在主表面上的任何一点的高程与跑道中心线或延长线的最靠近点的高程相一致)
tech.
first type surface
;
primary surface
主表面:
3 phrases
in 2 subjects
Aviation
2
Economy
1
The server is undergoing maintenance and the site is working in read-only mode. Please check back later.">
Add
|
The server is undergoing maintenance and the site is working in read-only mode. Please check back later.">
Report an error
|
Get short URL
|
Language Selection Tips