片语
manual operating valve手动操作阀
manual stop valve手动止动阀
manual shift valve手动换档阀
Manual butterfly valve手动蝶阀
manual tune valve手动下降阀
Manual brake valve手制动阀
manual load valve手动装载阀
hand-operated valve手动阀;手控阀
manual directional valve手助换向阀
manual globe valve手动截止阀