Cleanness : There is no internal an

Cleanness : There is no internal and external residue from checking visually.

Results (Chinese) 1:

清洁 ︰ 那里是从视觉上检查无内部和外部的残留。

Results (Chinese) 2:

洁净度：有从视觉上检查没有内部和外部的残留物。

Results (Chinese) 3:

清洁：检查视觉上没有内部和外部的残留。