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prototype machine | |||
proof-of-concept article (含义同 prototype); prototype | |||
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prototype engine | |||
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development aircraft |
原 型机 : 48 phrases in 11 subjects |
Agriculture | 1 |
Aviation | 14 |
Compressors | 1 |
Electric machinery | 5 |
Electronics | 3 |
Engineering geology | 1 |
Hydroelectric power stations | 1 |
Metallurgy | 3 |
Space | 10 |
Technology | 8 |
Wind Energy | 1 |