Chemical drawing is used for design or planning, and CAD chemical drawing is also designed in it, but you work as an instrument in a chemical plant, which has nothing to do with it. I suggest you read the book "Chemical Instrument Maintenance Worker". There used to be an instrument major in our school, but now it's gone, so it's changed to chemical equipment and maintenance/? new map = 1 & amp； s = con % 26wd % 3D % E5 % 94% 90% E5 % b 1% b 1% E5 % 8C % 96% E5 % B7 % A5 % 26c % 3D 265 & amp； fr = alae0 & ampext = 1 & amp； from=alamap