Y型阀截止阀
Y-valveY-body globe valve
截止角
cutoff angle
angle of cut-off
angle of deflection
angle of cutoff
Cut-off angle
Cut-off angle for observation
angle cut-off
mask angle
end angle
截止角频率
cut-off angular frequence
T形钠截止阀
T-type Sodium globe valve
差压式截止止回阀
differential stop check valve