3C强制性产品认证实施规则工厂质量保证能力要求王永庆的球童强制性产品认证实施规则工厂质量保证能力要求0.引言························································51.适用范围····················································52.术语和定义·······················

-备件的分类水喷嘴  备件的种类多，⼀般按下列⽅法分类。洗头床  (1）按零件类别分  ①机械零件，指构成某⼀型号设备的专⽤机械构件，⼀般可由|  ②配套零件，指标准化的、通⽤于各种设备的由专业⽣产⼚家⽣产的零件，如滚动轴承、液压元件、电器元件、密封件等。  （2）按零件来源分  ①⾃制备件。企业⾃⼰设计、测绘、制造的零件，基本上属于机械