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cross frame | |||
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cross frame |
交叉架 : 35 phrases in 8 subjects |
Bridge construction | 2 |
Explosives and Explosive Ordnance Disposal | 1 |
Hydroelectric power stations | 2 |
Oil / petroleum | 1 |
Rail transport | 2 |
Space | 1 |
Technology | 24 |
Transport | 2 |