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This forces carbon into the outer surface of the steel.
强制使碳元素进入钢材的表面。
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The outer surface of the main body is provided with a decorative mechanism.
在所述主体的外表面上设有装饰机构。
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The outer surface of the main body is provided with a decorative mechanism.
在所述主体的外表面上设有装饰机构。
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