Traditional Culture Encyclopedia - Photography major - The meaning of lo and APP in the picture, and the view that X-X is E-E is X-X view or original E-E view? And how to translate this picture, eh. .

The meaning of lo and APP in the picture, and the view that X-X is E-E is X-X view or original E-E view? And how to translate this picture, eh. .

Lo should be the position, that is, the position and tolerance of the above view on the drawing. There are letters and numbers on the edge of the standard diagram, similar to the description of chess pieces.

By and App should be people who draw and review, and MF and LX are abbreviations of names.

Literally, it should be the X-X section is the original E-E section.