... valve spring tester 气门弹簧试验器 valve spring wire 阀弹簧钢丝 valve stabilizer 电子管稳定器 ...
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car valve-spring wire 汽车阀门弹簧丝
car valve spring wire 汽车阀门弹簧丝
ventilfederdraht valve spring wire 汽门弹簧丝
valve spring steel wire 气门弹簧钢丝
·2,447,543篇论文数据，部分数据来源于NoteExpress
Then, pneumatic valve spring made from this spring steel wire have been treated by this investigation of liquid tufftriding process.
然后，用以对此规格的钢丝制造的气阀弹簧进行了低温液体软氮化处理。
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