bailer dump捞砂筒的倒砂门;捞砂筒捞出物;用筒装物体倒入井内
bailer conductor捞砂筒
hydrostatic bailer水力捞砂器;水力打捞器
suction bailer吸入式砂泵
sand bailer捞沙筒
buoyant bailer可浮式水瓢;浮水杓
dirt bailer泥浆泵
bailer crownblock戽斗用拱顶滑车;捞砂用天车绳轮
cleanout bailer捞砂筒