You definitely need a way to find out the part you want to see among the huge number of "gear wheel", else you will get in trouble.
毫无疑问，您需要一种方法来在大量“齿轮”中找到您所需的部分，否则您将遇到麻烦。
The gear spins on the wheel hub, drives the other gears, which, according to the number of the teeth, spin faster or slower than the original one.
齿轮在轮毂或轴上旋转，带动其它一些齿轮，后者则可以比前者转得快或慢，这取决于基本齿轮的齿数。
This spare parts (gear wheel) suitable for various types of machinery, easy assembly, durable, strong, the number of adequate and reasonable price.
此配件(齿轮)适合于各种类型机械，便于装配，耐用坚固，数量充足，价格合理。
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