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reciprocal theorem
bridg.constr. 互易原理; 互等定理; 交互定理; 相互定理
oil 可逆定理
tech. 逆定理; 互易定理; 倒易定理; 倒易理论; 相互作用定理
reciprocal theorem: 17 phrases in 4 subjects
Automobiles1
Bridge construction8
Construction1
Technology7