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物标; 视觉信号 | |||
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光标; 光学标记 | |||
光学测标 | |||
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物标; 视觉信号 | |||
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光学测标 |
optical marking : 33 phrases in 12 subjects |
Agriculture | 1 |
Automobiles | 2 |
Aviation | 1 |
Business | 1 |
Chemistry | 1 |
Computers | 2 |
Electronics | 4 |
Exhibitions | 1 |
Information technology | 2 |
Space | 4 |
Technology | 13 |
Telecommunications | 1 |