短語詞組短語spring back radial seal 彈簧支撐徑向密封back -blade seal 背葉片密封poly -silicon back-seal 多晶硅背封Liquid Back Seal 右密封Back seal gas 沖吹氣體Back seal test 上密封試驗;上彌縫實驗;上密封實驗;上彌縫測試Back Seal Automatic Packing Machine 背封式自動包裝機 返回 back seal