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commercial use test | |||
in-service test; in-service testing; in-use testing; operational test | |||
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actual service test; commercial use test |
实用试验 : 15 phrases in 8 subjects |
Automobiles | 2 |
Aviation | 2 |
Earth sciences | 2 |
Metallurgy | 1 |
Mining | 1 |
Space | 2 |
Technology | 4 |
Textile industry | 1 |