कंट्रोलर ज्यामध्ये लहान कोंबडा किंवा नल किंवा हवा बाहेर पडण्यासाठी किंवा कॉम्प्रेशन सोडण्यासाठी वाल्व असते.,

petcocks's Usage Examples:

Most petcocks have three positions: OFF - This position is important to keep the tank.

Historically, petcocks were threaded valves controlled by a butterfly handle;[citation needed] modern petcocks are typically ball valves.

4 US gal) fuel tank, fitted with dual petcocks and signed by Gaston Rahier.

employed 30 people in making ignition locks, door locks, keys, and brass petcocks.

taken on board under guard, but not before they had opened seavalves and petcocks in order to scuttle the submarine before abandoning it.

Historically, petcocks were threaded valves controlled by a butterfly handle;[citation.