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One simple way of describing strength is in terms of surface hardness.
描述强度的一种最简单方法是以表面硬度来表示。
youdao
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Suggestion: pump shaft or protective set of surface hardness to achieve 60hrc.
建议：泵轴或防护套的表面硬度要达到60hrc。
youdao
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Suggestion: pump shaft or protective set of surface hardness to achieve 60hrc.
建议：泵轴或防护套的表面硬度要达到60hrc。
youdao