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to phrases
extrados
[ek'streɪdɔs]
n
gen.
拱背
线
;
外拱线〔圈〕
;
拱洞的外弧面
archit.
拱背
(线)
avia.
机体上表面
;
拱背
(拱的外缘线)
bridg.constr.
拱外圈
eng.geol.
外表面
;
拱的外圈
hydroel.st.
外弧面,拱背
met.
拱背线
oil
拱背
space
供背线
;
拱顶面
tech.
拱弧的外曲线
;
外弧面
;
外拱圈
extrados
:
20 phrases
in 4 subjects
Bridge construction
1
Electronics
1
Hydroelectric power stations
1
Technology
17
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