What are the symbols on the construction drawings of the explosion proof lamp?
Draw your own, and use Chinese characters to express it
The current national standards are generally closer to the international community, lamps are generally unified graphical symbols, the difference is that the outside of the marked characters.
The current national standard for explosion proof lamps is the universal light symbol (cross cross in the circle). Usually the two cross line with an angle of 45 degrees from the horizontal line, and then the character Ex. is outside the figure
