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to phrases
开口三角形
el.
broken delta
;
open delta
tech.
open delta
(连接)
开口三角形
连接
gen.
open-delta
开口 三角形
:
12 phrases
in 7 subjects
Aviation
1
Electric machinery
3
Electronics
2
Hydroelectric power stations
2
Metallurgy
2
Space
1
Technology
1
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