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1、Installation distance between two holes：78±0.5;
2、Length of exposed steel wire：39±0.5.

1、Rated voltage：220V or 110V;

2、Rated frequency：50~60HZ;

3、Distance of working trip：±1;

4、working life > 50，000 times;

5、Noise < 50bd;

6、Traction≥80N;