Igwe anaghị agba nchara flanged bọọlụ valvụ, valvụ globe, valvụ ọnụ ụzọ mgbe ejiri ya, naanị maka imeghe ma ọ bụ mechiri emechi, ekwela ka ịme usoro ịgbasa mmiri, ka ịzenarị mbuze elu, akwa ngwa ngwa. Ọnụ ụzọ ámá valves na elu ịghasa globe valves nwere ike akara ngwaọrụ, aka wheel n'elu ka anyị ...
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