single-shell casing 单层缸
circular shell casing 薄壳圆套管
casing shell 外壳
Optical Mouse shell from the beginning, the company gradually introduced wireless keyboard and mouse shell casing and other products.
从光电鼠标外壳开始，公司逐步推出无线鼠标外壳及键盘外壳等系列产品。
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