inner valve spring
内气门弹簧 inner valve spring
缸盖内气门弹簧 cylinder head inner valve spring
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斯太尔发动机气门内、外弹簧、汽车用悬架弹簧、模具强力弹簧系列同时荣获新产品优秀奖；
Steyr valve inside and outside spring of engine, automobile suspension spring, die spring series won the excellent new products prizes.
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