double acting hydraulic jack

双作用伸缩式液压缸,dual... ... ) double-action cylinders 双作用液压缸 ) double acting hydraulic jack 双作用液压油缸 ...

建筑专业英... ... double acting door 推拉门 double acting hydraulic jack 双酌液压油缸 double acting pile hammer 复动桩锤 ...