Asneedoflargenumberdischarge,
pleaseputthescrewofairvalverotationincounterclockwisedirection.
Asneedofalittledischarge,pleasepressthecoreofairvalveforrelease.
pleaseputthescrewofairvalverotationincounterclockwisedirection.
Asneedofalittledischarge,pleasepressthecoreofairvalveforrelease.