The most appropriate description about the role of the cap for high-pressure gas cylinders is ( ).(2 points)
A: to protect the valve from being damaged, prevent dust, grease, and other debris into the cylinder valve
B: to label gas names and properties
C: for beauty
D: for proper labeling of cylinder manufacturing standards
A: to protect the valve from being damaged, prevent dust, grease, and other debris into the cylinder valve
B: to label gas names and properties
C: for beauty
D: for proper labeling of cylinder manufacturing standards
举一反三
- In an engine with air inlet valve and exhaust valve on its cylinder heads the fresh air will enter into the cylinder （） and the gases exhaust （）， there being an adequate overlap between the inlet opening and the exhaust closing.
- In addition to lubricating， cylinder oil assists in forming a gas seal and contains （） which clean the cylinder liner. A: additives B: water C: grease D: acid solutio
- Each cylinder has one starting valve which is usually opened by air pressure and closed by （）
- gas cylinder ______
- The gas lift valve is the channel and switch where the gas enters the lift pipe.