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本机构提供了一种能够使主动齿轮与从动齿轮在保证正常的机械传动外,还能使主动齿轮与从动齿轮间的中心距象普通铰链的
The organization provides a way to make the driving gear and driven gear to ensure normal mechanical transmission, but also make the center distance between the driving gear and the driven gear like a normal hinge