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回动弹簧 huídòng tánhuáng
compr. return spring
oil backspring
plast. reversing spring
tech. drawback spring
回动〔回位,释放,回程用〕弹簧
mech.eng. retracting spring
回动弹簧: 21 phrases in 4 subjects
Automobiles8
Compressors1
Shipbuilding1
Technology11