orificen.孔
orifice support tube锐孔支管
orifice column mixer筛板塔混合器
orifice differential孔流分压计
orifice viscosimeter管孔粘度计,孔口粘度计
orifice of spinneret吐丝孔
orifice control valve锐孔调节阀,孔板节流阀
orifice plate opening孔板洞
orifice of pulp canal齿根尖孔, 齿髓管口
orifice-column mixer筛板塔混合器
Orifice or Gas Cup Size喷孔或喷嘴尺寸