正时皮带被使用，因为他们花费少于链子，而且噪音少。
Timing belts are used because they cost less than chains and operate more quietly.
顶制凸轮轴结构的汽车发动机都配备了正时皮带，并且这个皮带的生命周期是有限的。
Supplier Dynamic Selection Mechanism of Automobile Industry Based on Different Phase of Product Life Cycle;
顶制凸轮轴结构的汽车发动机都配备了正时皮带，并且这个皮带的生命周期是有限的。
Supplier Dynamic Selection Mechanism of Automobile Industry Based on Different Phase of Product Life Cycle;
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