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自由公差一般是多少
释义
自由公差一般是0.4mm。基准件公差上精度等级分成12级,其中8、9两级精度基准件公差称为自由尺寸公差。在机械加工中自由公差的标准一般为0.4mm,超出则无法表明。
《标准化法》第二条本法所称标准(含标准样品),是指农业、工业、服务业以及社会事业等领域需要统一的技术要求。标准包括国家标准、行业标准、地方标准和团体标准、企业标准。国家标准分为强制性标准、推荐性标准,行业标准、地方标准是推荐性标准。强制性标准必须执行。国家鼓励采用推荐性标准。
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contract for processing work
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更新时间:2026/5/19 18:57:29