What can I do when I fill a P certificate in a gas cylinder?

Turner, fitter. The P Certificate of Gas Cylinder Filling Station can be used as lathe operator and fitter. The main operation type is gas cylinder filling operation, and the secondary category is gas cylinder filling operation. Operation code is p, engaged in gas cylinder filling and related positions. The classification and items of qualification certification of special equipment operators show that the code of cylinder filling certificate is P, so it can be called cylinder filling P certificate.