Englishfor English speakers
acetylene
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noun
a colorless flammable gas used chiefly in welding and in organic synthesis
cylinder
Noun
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A cylinder is a shape consisting of two circles connected to a tube.
valve
Noun
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A valve is part of a tube that lets liquid or gas go through one way but stops it from going through the other way.
There are four valves in the heart that let blood go in one direction but stop it from going in the other direction.
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A valve is part of a tube that someone can open or close to let water or other things go through.
Open this valve to let water go through the pipe.