单闸板 Single disc ; Single gate disc ; Single e disc

单闸板平板闸阀 Single Disc Flat Gate Valves ; Manual Oil Pumps Valves

单闸板防喷器 single ram preventer ; single ram type BOP ; [油气] single ram type perventer

楔形单闸板 split wedge ; Solid wedge

单闸板平板 Single Disc Flat Gate Valves

单闸瓦制动 single type brake

暗杆楔式单闸板闸阀 Non Rising Stem Single

单闸片离合器 [机] single-plate clutch