短語詞組短語casing -pipe wall 套琯壁exhaust outlet casing partition wall 排氣隔板casing wall static pressure 機匣壁麪靜壓casing wall thickness 套琯壁厚casing wall broken down 缸套損壞gamma density -casing wall logging 伽馬密度wall casing 穿牆套琯thick -wall casing 厚壁套琯surface casing shaft guide -wall 套井 返回 casing wall