GB/T 32979-2016建材机械产品分类及型号编制方法国家标准
英文:Classification and nominating editorial method for building material machinery products GB/T 32979-2016介绍: 国家标准《建材机械产...
英文:Classification and nominating editorial method for building material machinery products GB/T 32979-2016介绍: 国家标准《建材机械产...