Why isn't there a standard cable type for everything?

为什么每种东西不使用标准型号的电缆？

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While placing an order, please write clearly cable type, specification, standard code and quantity.

订货时请标明电线型号、规格、标准编号及数量。

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While placing an order, please write clearly cable type, specification, standard code and quantity.

订货时请标明电线型号、规格、标准编号及数量。

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