IEC 63182-4:20 21规定了对机械互换性重要的优选尺寸范围，并给出了由金属磁粉制成的块芯表面不规则性允许限值的指南。 本文件是关于表面不规则性的规范，在磁粉芯供应商和用户之间的谈判中很有用。

IEC 63182-4:2021 specifies the preferred range of the dimensions that are of importance for mechanical interchangeability and gives guidelines on allowable limits of surface irregularities for block-cores made of metallic magnetic powder.
This document is a specification about surface irregularities which is useful in the negotiations between suppliers and users of magnetic powder-cores.