How to distinguish whether the radiator is inferior？

There are a large amount of low -quality radiator radiator heat sink on this. This radiator Semiconductor Enclosure Heater radiator is from the country in terms of material material material material, processing requirements, and component quality, etc.The whole machine of the industry’s standard device can greatly affect the user’s selection from the following:
1. (((((())) and processing accuracy accuracy and crack cracks of craftsmanship, etc.Bad bad
2. The radiator contacts the surface of the surface, and the surface is directly on the surface;;;;
3. The radiator dish spring, after 24 hours, free, free and stable, otherwise stable, otherwise stable thermostat sk3110 and stable spring spring spring may fail