A tuning fork socket tester is also needed to do final test without damaging the balls.
A tuning fork socket tester is also needed to do final test without damaging the balls.
还有不会损坏植球的音叉测试座用来作最终测试。
A tuning fork socket tester is also needed to do final test without damaging the balls.
还有不会损坏植球的音叉测试座用来作最终测试。