goats is a form of:

Air pump



noun
1.
ប្រដាប់បូមខ្យល់
ENGLISH MEANING
1.
A kind of pump for exhausting air from a vessel or closed space; also, a pump to condense air or force it into a closed space.
2.
A pump used to exhaust from a condenser the condensed steam, the water used for condensing, and any commingled air.