Not all vendors follow this convention, however, and even those who do may sometimes use different designators.

不是所有的厂商都遵从这样的约定，有时还会使用不同的指示符。

youdao

Not all vendors follow this convention, however, and even those who do may sometimes use different designators.

不是所有的厂商都遵从这样的约定，有时还会使用不同的指示符。

youdao