valve spring steel wire
Spring Force of Constant Torque Spring and Wing-up Spring
pressure reducing valve reducing valve
valve disc type breath valve
contact spring pile-up (contact spring assembly)
spring wheat spring corn intercropping system
active controlled restrictor
adjustable restrictor orifice
Environmental Restrictor
membrane-type restrictor
restrictor
节
限
限位
节流器（静压轴承)
限流量器
节流器
限流器
节僚
限制器
节流节力