罩优选是双层壁，具有带内 螺纹的裙部以及带棘齿指状物的外裙部。
The closure preferably is a dual-wall closure having an internal skirt with the internal thread and an external skirt with the ratchet fingers.
特别指用于贮藏液态气体的真空容器，有双层壁，壁间为真空，接触真空的表面镀银。
An insulated container used especially to store liquefied gases, having a double wall with a vacuum between the walls and silvered surfaces facing the vacuum.
坚固的外壳，双层壁式结构、大容量、轻触式控制面板，运行情况一目了然，可以满足各类碗碟以及玻璃杯的高标准洗涤要求。
The robust yet elegant double-wall construction , the high washing capacity, the cost-effective operation , meets up with the high standard requirement of various plates, glasses and bowls.
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