The error can be avoided by increasing the gear grinding allowance in length of common normal line to grind gear.
此误差可通过在公法线长度方向上加大留磨量，进行磨齿予以消除。
It is strongly suggested that the common Central Line of the motor, hydraulic coupler and fan be determined at unit's normal operating temperature.
重点在考虑工作温度的条件下确定其电机、液力偶合器、风机的中心线。
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