GB/T 40673-2021计时仪器辐射发光涂层检验条件标准
英文:Timekeeping instruments—Conditions for carrying out checks on radioluminescent deposits GB/T 40673-2021介绍: 国家标准《计时仪器 ...
英文:Timekeeping instruments—Conditions for carrying out checks on radioluminescent deposits GB/T 40673-2021介绍: 国家标准《计时仪器 ...
英文:Silver jewellery alloys—Determination of silver—Volumetric (potentiometric) method using potassium bromide GB/T 17832...
英文:Silver jewellery alloys—Determination of silver—Volumetric(potentiometric) method using sodium chloride or potassium ...
英文:Jewellery—Ring-size—Definition, measurement and designation GB/T 11888-2021介绍: 国家标准《首饰 指环尺寸 定义、测量和命名》由TC256(全国首饰标准化技术...
英文:Determination of platinum content in platinum alloys—Spark atomic emission spectrometric method(difference method) GB...