It has rounded shoulders inside instead of the sharp orifice - like edge.
在内部作成圆形凸肩以代替锐缘孔板状的侧面。
2
It has rounded shoulders inside instead of the sharp orifice-like edge.
在内部作成圆形凸肩以代替锐缘孔板状的侧面。
3
The bright area of reflex is enclosed by the reflection points of two ends of linear lamp-house at the edge of orifice of lamp and points of intersection with testing screen.