orificen.孔
orifice supporttube锐孔支管
orifice well tester孔板测试器
orifice conductance小孔流导
orifice restriction锐孔的收缩
orifice coefficient锐孔系数,流量系数
orifice check valve小孔止回阀
orifice panel valve孔板阀
orifice gas scrubber锐孔气体洗涤器
orifice flow-meter孔板流量计
orifice compensation小孔节流