GB 9821.3-1988.Gears for time measuring instruments-toleraoce of gears.4精度等级GB 9821.3规定齿轮精度分为8个等级，由高到低依次称为5.6.,.... ,12级,对同一-齿...
GB 9821.2-1988.Gears for time measuring instruments-Gears with round flanks.1主题内容 与适用范围GB 9821.2规定了计时仪器用圆弧齿轮的齿形、齿轮参数及尺寸...
GB 9821. 1-1988.Gears for time measuring Instruments-Basic terminologies definitions and symbols.3.10分度圆reference circle圆柱齿轮的分度圆柱面与端平面的交线。3...
GB/T 23103-2008.Beach umbrella.5.7使用安全 .在使用过程中可接触的部位不应有伤害人体的锐角、快口、毛刺,铁丝头不应外露。5.8开关性能开伞关伞...
GB/T 22808-2008.Leather and fur- Chemical tests- Determination of pentachlorophenol content.1范围GB/T 22808规定了皮革、毛皮中五氯苯酚及其盐和脂含量的测定方法...
GB/T 14531-2008.Office furniture-Tables 、chairs and stools for reading.1范围GB/T 14531规定了阅览桌、椅、凳产品的术语和定义、要求、试验方法、检验规则...
GB/T 13174-2003.GB/T 13174规定了用人工污布进行去污试验来评价洗涤剂去污力,用棉白布评价洗涤剂抗污渍再沉积能力(又称白度保持)的方法。GB...
GB/T 13173. 7-1993.Soaps and detergents- Determination of EDTA (chelating agent) content-Titrimetric method.5仪器实验室常用仪器及5.1pH计:配有玻璃电极和甘汞电极及...
GB 7982-1987.Pulps-Laboratory sheets Determination of physical properties.GB 7982等效采用ISO5270,适用于测定按GB7981《纸浆实验室纸页的制备常规纸页成型器法》...
GB 5943-1986.A nti- color change corrosion testing method of the metal deposits and converslon coatings for the light industrial products Hydrogen sulfide test.GB 5943适用于铜和铜...
