短語詞組短語bucket main control valve 鏟斗主控制閥backhoe bucket control valve 反鏟斗控制閥multipurpose bucket control valve 多用途鏟斗控制閥bucket control valve component 鏟斗控制閥部件bucket control valve spool 鏟斗控制閥滑閥 返回 bucket control valve