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点划线; 工程图中心线 | |||
中心线 | |||
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点划线 | |||
点画虚线; 假想线 |
dash and : 23 phrases in 11 subjects |
Architecture | 1 |
Desert science | 1 |
General | 5 |
Metallurgy | 1 |
Oil / petroleum | 2 |
Rail transport | 2 |
Skydiving | 1 |
Space | 1 |
Technology | 5 |
Telecommunications | 1 |
Textile industry | 3 |