所有的吊钩销全部经过涡电流检验，以确保相同的硬度品质。
All the hook after selling all the eddy current inspection to ensure the quality of the same hardness.
以轧辊表面的涡电流引导做为检验方式，以不同的双电线探头交替检测，再轧辊表面上移动位置并随之调整电流导电率。
Eddy current inspection is performed by the inducement of eddy currents on the roll surface by the application of an alternating current from a dual-wire differential probe.
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