sealed silica envelope

例句：

1. 1. The sealed silicone envelope is used to protect delicate electronic components during transportation.
   密封硅酸盐包覆物用于在运输过程中保护敏感的电子组件。
2. 2.The sealed silicone enclosure is designed to prevent moisture and dust from entering the device.
   密封硅酸盐封装设计用来防止水分和灰尘进入设备。
3. 3. The sealed silicone envelope is commonly used in the packaging industry as a protective layer for fragile items.
   密封硅酸盐包覆物在包装行业被广泛用作脆弱物品的保护层。