One of the questions in the boiler pressure vessel exam tomorrow
You see the special equipment safety inspection ordinance.
Look for the textbook that is designed by the pressure vessel. The introduction or introduction is the answer! A good back back!
Pressure vessel manufacturing is very strict operation and operation of internal pressure, full of toxic gas, in the event of accident, consequences, especially on the sealing performance of pressure vessel, pressure load capacity requirements strictly!!!!! So it is very strict in manufacturing operation!!
