Group A: Users/operaters/users of GLN reservoirs/installations with up to 13 m3 over/under the landGroup B: User/operater/users of reservoirs/GLN installations with over 13 m3, over/in the soilGroup C: User/operater/user of pressure appliances/installations of technological equipment and air tanksGroup D: Steam boilers/steam/water/hot oil usersGroup E: User/operater/user of the containers/installations at cryogenic pressureGroup F: User/operater of installations of […]