We visited several metrology labs at NIST's Electricity Division to see what happens at the top of the calibrationchain.
我们参观了NIST的几个电气部门，来了解一下顶级的校准链里到底发生着什么。
2
The current methods of the radiometric calibration are based on the establishment of high-precision primary standard and standard transfer chain, and the transfer chain is the main source of errors.
现行辐射定标方法都需要建立高精度初级标准及标准传递链，传递环节是误差的主要来源。
3
The paper reviews the process from ring chain type bucket elevator to plate chain bucket elevator and indicates the strength calibration of driving wheel axle.