IT is mainly test the contacts ,pins and jacks plug force and plug cycle  . ...

Rockwell hardness tester is used for hardness testing of metal materials...

The gear tester (or gear measuring instrument) is a precision instrument used to measure gears and can detect parameters such as the tooth p···...

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The roundness tester is mainly used to measure the roundness error of workpieces as well as their related geometric features....

Spectral analyzer is a high-precision scientific instrument used for identifying the composition of substances, analyzing their structure, a···...