短語詞組短語plugging instrument 充填器plugging forceps 填塞鉗plugging compound 填充料plugging switch 逆流制動(dòng)開關(guān);插入開關(guān)plugging machine 塞瓶機(jī)selective plugging 選擇性封堵nozzle plugging 噴嘴堵塞permanent plugging 永久性堵塞plugging material 封堵材料plugging agent 堵水劑，封堵劑 返回 plugging