短語詞組短語charging g hole 裝料琯道non -charging blasting hole instrument 砲孔疏通器oil charging hole 注油孔charging hole seat 裝煤孔座Feed Charging Hole 加料口coal charging hole 裝煤孔hole charging 砲眼裝葯slim -hole charging 葯孔in -hole chargg method 井中充電 返回 charging hole