Edison's lab put a lot of effort into making a bulb with a platinum filament, but that work went nowhere, because platinum has a relatively low resistance.
爱迪生的实验室为制造铂丝灯泡付出了大量的努力，但这些投入都白费了，因为铂的电阻相对较低。
2
If the heater circuit is working, it heats the sensing blub, thus changing the resistance of the bulb.
如果加热电路工作，它加热温度传感头，从而改变传感头的阻值。
3
The technology reduces contacting resistance of the lead wire joint of the cold-light bulb and prolongs service life the cold-light bulb.