本试具球用以检验防止直径大于等于50mm的固体异物进入设备内部。
This sphere is intended to verify the degree of protection of enclosures against ingress of solid foreign objects having a diameter of 50 mm or greater.
满足IEC61032 Figure 5 – Test probe 1 或者GB/T16482 图5试具1.

尺寸：直径50mm