齿轮渐开线样板和螺旋线样板是齿轮参数的标准计量器具，分别用于齿轮仪器渐开线、螺旋线参数的校准。
The gear involute master and helix master are measurement standards and usually used to calibrate the involute and helix parameters of gear equipments.
齿轮渐开线样板和螺旋线样板是齿轮参数的标准计量器具，分别用于齿轮仪器渐开线、螺旋线参数的校准。
The gear involute master and helix master are measurement standards and usually used to calibrate the involute and helix parameters of gear equipments.
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