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cross | |||
cross-staff; cross-nailed material; cross staff head; optical square | |||
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square | |||
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optic square; optical square | |||
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optical square |
直角器: 47 phrases in 9 subjects |
Agriculture | 3 |
Air defense | 1 |
Aviation | 2 |
Electronics | 2 |
Metallurgy | 1 |
Oil / petroleum | 1 |
Space | 2 |
Technology | 34 |
Welding | 1 |