The tests in this specification are intended to confirm the effectiveness of passivation, particularly with regard to the removal of free iron and other exogenous matter.

本技术规范之中的检测意在证实钝化的效果，尤其是关于游离铁和其它外生物质（杂质）的去除问题。

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Sand bottom die-casting padlock series, sentinel production "earth" brand iron padlock series, breed diversity, the specification is complete.

砂底压铸挂锁系列，定点生产“地球”牌铁挂锁系列，品种多样，规格齐全。

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The nodular cast iron V jig's use are quite few, generally the use is small in the specification, accuracy requirement high V jig.

球铁V型架的使用比较少，一般使用在规格较小，精度要求较高的V型架。

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