1. Glass: part of the bulb is covered with heat insulation and protection in the ball inside the filament, to avoid contact with the air.2. Filament. Can use carbon fiber, metal fiber, but common is volfram metal wire. When there's electricity and hot light shining on the lights.3. In the part of the shell plastic lamp holder, lamp holder, the so-called one. This part of the circuit has two parts of private hot and cold line, between electricity and power line of the flight and the outside of the lamp.
đang được dịch, vui lòng đợi..
