English to Polish Tech/Engineering Ships, Sailing, Maritime

O urządzeniach czyszczących pod cisnieniem:

Before activating a pressure system, and also when closing down, the recommended checks should be made to ensure that no air pockets or trapped pressure are in the system, as these may cause erratic action of the equipment.

Niby wiem, o co chodzi, ale na polski mi sie to nijak nie przekłada. Może ta późna pora...