Ball seat [机] [机] 球座 ; 球垫 ; 阀座
SEAT - BALL END 球头座
SEAT-BALL END - PULLING ROD 球头座
ball-and-seat 单流阀
drag link ball seat 拉杆球座
shearout ball seat sub 剪切球座接头
ball and seat valve 球形止回阀
BALL SEAT PTFE 球座 ; 球垫 ; 阀座
These "spurs," worn on airplanes, strapped over boot heels and were each attached to a ball connected to a cable beneath the plane seat.
这些“马刺”是在飞机上使用的，它可以捆住鞋后跟，系在与飞机座椅下方一根缆线相连的球上。
Then install valve upside down for fluid to lift ball into seat.
然后倒置安装阀门，使得流体将球提升到阀座上。
Gravity ball check valves are converted to vent valves by replacing the standard ball with a floater ball and inverting the valve at installation-with seat up.
重力球形止回阀可以变为通风阀，只需用漂浮球体更换标准球体，然后在安装时将阀门倒置，使其阀座向上即可。
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