ball collar thrust bearing
ball float level control
ball float level controller
ball float trap
浮子式疏水器
浮球式疏水阀
最小二乘支持向量机(LSSVM)
浮球式阻气器
浮球式阻汽器
float ball valve made of titanium
differential float collar
collar band is longer than collar
collar band is shorter than collar