orificen.孔
orifice cone孔锥
orificed tip漏嘴
orifice flow孔口流动
orifice union节流组件
orifice mixer孔流混合器
orifice gauge孔板测流规
orifice valve阻尼阀
orifice plate量孔板,锐孔板,节磷板
orifice meter孔板量计,孔板流量计,孔极量计
orifice metre孔口流量计