Enclosure has no vent opening. Enclosure dimensions exclude the external aluminum heatsink.

外包装没有通风口。外包装尺寸并不包括外置铝散热片。

youdao

Appearance: remarkable abnormality such as pressure relief vent opening, electrolyte leaking, etc.

外观：明显缺陷，如防爆阀打开、电解液泄露等。

youdao

Well, you may not actually need this, but the improper placement of the vent opening is a small problem.

不错，你可能根本不须这样做，但放置不当的气孔是个小问题。

youdao