一只佳能相机用了快两年，一直放在包里，外壳逐渐磨损，但却仿佛是最知己的老友，分享内心所有细微感受。
Canon camera whose surface layer wears out little by little in this two years, often packed in my travelling bag, is my best confidant which shares in all my exquisite emotions.
发电齿轮箱的外壳包覆驱动轴。
The casing of the electricity generating gear box covers the driving shaft.
所述水箱的外部包覆有散热外壳，在所述外壳的侧壁上分别开设有进出风口。
Cooling shells wrap the exteriors of the water tanks, and wind inlets and outlets are respectively arranged on the side walls of the shells.
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