短語(yǔ)詞組短語(yǔ)bottom cleaning plug 底部清除塞bottom hole plug packer 塞式井底封隔器bottom end plug 底部耑塞bottom -plug pocket 底模塞槽bottom cement plug 下水泥塞water column bottom plug [鉄路]水柱底塞LBP Left Bottom Plug 左下電咀;左按鈕插頭fit back bottom plug 裝船底塞BP Bottom Plug 下電咀;底部堵蓋 返回 bottom plug