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| sketch map | |||
| reconnaissance map | |||
| eye sketch | |||
| skeleton map; sketch survey map | |||
| |||
| reconnaissance map | |||
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草测 图 : 9 phrases in 6 subjects |
| Aviation | 1 |
| Bridge construction | 1 |
| Hydroelectric power stations | 1 |
| Metallurgy | 1 |
| Oil / petroleum | 1 |
| Technology | 4 |
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