It's outer casing is made of highstrength aluminium alloy, and treated by a special process. It's optical part is full coated.
外壳用高强度铝合金制造并经特殊处理，光学零件全镀膜。
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The proposal model of the high collapse strength in this paper can't only provide the given reference for the present high collapse strength, but also improve the casing manufacturing quality.
Due to adopt unique anti dithering, vibration and swing the intelligent digital filters, good stability, reading stable time is short, highstrength aluminum alloy casting casing.