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Gray powder metal, pure, without any visible inclusions and oxidation color.
灰色粉末状金属，纯净、无肉眼可见夹杂物及氧化色。
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In the atmosphere oxidation resistance is not easy to change color.
在大气中耐氧化不易变色。
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In the atmosphere oxidation resistance is not easy to change color.
在大气中耐氧化不易变色。
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