功能:测试弹簧脚的弹力与碟盘铰链的松紧度
testing the strength of Temple with Spring and tightness of housing
功能:测试弹簧脚的弹力与碟盘铰链的松紧度
testing the strength of Temple with Spring and tightness of housing
功能:测试弹簧脚的弹力与碟盘铰链的松紧度
testing the strength of Temple with Spring and tightness of housing