外观疵点的英文

a earance

appearance

visible defect

• 外观:    outward appearance ...
• 疵点:    flaw; fault; defec ...
• 单丝外观疵点:    exterior defect of ...

例句与用法

1. Flexible sheets for roofing - determination of visible defects - part 1 : bitumen sheets for roof waterproofing ; german version en 1850 - 1 : 1999
   防水软板.外观疵点测定.第1部分:屋顶防水沥青毡