计时仪器用齿轮 端面齿轮
Gears for timekeeping instruments - Contrate gears
2008-12-30
GB/T 22776-2008
计时仪器用公差与配合 塑料件公差
Tolerances and fits for timekeeping instruments - Tolerances of plastic parts
2008-12-30
QB/T 2266-2012
计时仪器用极限与配合 尺寸至1mm孔、轴公差带与配合
Tolerance zones and fits for holes and shafts size up to 1mm for timekeeping instruments
2012-11-07
QB/T 2267-2015
计时仪器用极限与配合 公称尺寸至18 mm插入中间公差等级的标准公差数值
Limits and fits for timekeeping instruments - Standard tolerance value of inserted middle tolerance grade for nominal size up to 18 mm