Home / Standards / GBT 39643-2020 GBT 39643-2020 Geometrical product specifications — Sources of systematic error and measurement uncertainty introduced by temperature effects in length measurement 产品几何技术规范 长度测量中温度影响引入的系统误差和测量不确定度来源 Standard Type GBT ICS N/A CCS N/A Status N/A Issue Date N/A Implementation N/A Responsible Dept N/A Drafting Unit N/A