Angle square: Use it for layout, cut-line marking or to check corners for squareness.
角尺：用它做版面设计，制作图例或检查矩形的角。
2
The technician can manipulate the lens to check the light transmission from every Angle and determine whether a part of the surface requires additional polishing.
技师能够从各个角度熟练控制镜头来检查光传导并判断镜头表面是否需要更多打光。
3
You also check for the valid Angle range when setting the value.