orifice ring mark [机] 料碗印

orifice ring holder [机] 料碗壳

shape of orifice ring 孔板体型

energy dissipation through orifice ring 孔板消能

carrier-ring orifice 环室孔板

orifice-plate ring 孔板环

carrier-ring orifice plate 环室式孔板

ring chamber standard orifice 环室型标准孔