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直角器 zhíjiǎoqì
gen. cross
tech. cross-staff; cross-nailed material; cross staff head; optical square
光学直角器 zhíjiǎoqì
gen. square
直角旋光
tech. optic square; optical square
直角转光,旋光
life.sc. optical square
直角器: 47 phrases in 9 subjects
Agriculture3
Air defense1
Aviation2
Electronics2
Metallurgy1
Oil / petroleum1
Space2
Technology34
Welding1