This test method covers the determination of the change of resistance with temperature of metallic materials for electricalheating, and is applicable over the range of service temperatures.
本试验方法适用于电热合金随温度变化的测量,亦可用于超过电热合金使用温度范围的情况。
2
The principle and the design method of a adjustable voltage unit for the heating transformer in electrical upsetting machine is introduced.