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抗 拉 力 : 20 phrases in 11 subjects |
Automobiles | 2 |
Bridge construction | 2 |
Construction | 1 |
Explosives and Explosive Ordnance Disposal | 2 |
Jewelry | 1 |
Metallurgy | 1 |
Oil / petroleum | 1 |
Pulp and paper industry | 1 |
Space | 1 |
Technology | 7 |
Textile industry | 1 |