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验证书
securit. confirmation
装备等验证书
auto. proof record
验证书
: 196 phrases in 28 subjects
Automobiles2
Aviation1
Business24
Chemistry2
Commerce9
Compressors1
Computers1
Drilling1
Economy17
Electric machinery2
Electronics3
Engineering geology3
General1
Hydroelectric power stations1
International trade23
Logistics5
Metallurgy1
Nautical8
Oil / petroleum4
Plastics2
Project management7
Quality control and standards1
Rail transport1
Shipbuilding21
Space3
Technology40
Textile industry10
Wind Energy2

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