valve box cover的意思|示意

阀箱盖 ... 潜入水下电泵(排污泵) submerged 摩托 pumps 阀箱盖 valve box cover 无阀隔阂泵 valveless diaphragm pump ...

船用阀箱 ... 船用阀箱 盖 cover for valve box 船用阀箱 盖 valve box cover 船用阀箱式活塞泵（美） turret type piston pump ...

阀箱 ... valve box cover 阀箱盖 ; 船用阀箱 ; 阀箱 valve assembly cover 阀组合盖 supply valve access cover 供油阀检视盖 ...