The experimenter has two jobs, and there is no laboratory in the project department of his unit, so you will go every time you send it for inspection, accompanied by the supervisor; If your project department is relatively large and has a laboratory, it is not required to send it to the designated quality supervision station for testing, you will do the testing yourself, but generally, the function of your own laboratory is relatively simple, and many materials still need to be sent to the quality supervision station for testing.