Filament is in the form of very thin coil wire or straight wire, which is used to convert electrical energy into light energy. This was the first optical power source, tungsten filaments were used in incandescent lamps or light bulbs.

Tungsten wire diamond wire, also known as tungsten wire rope, tungsten wire diamond cutting wire or tungsten-based diamond wire, is a kind of diamond wire with pure tungsten wire or doped tungsten wire as the busbar.

Before 2013, photovoltaic silicon wafer cutting mostly used free abrasive mortar cutting process to cut silicon material.

The power number of the bulb is usually marked on the bulb, because we usually use 110V AC. Therefore, it is easy to calculate the resistance of the tungsten wire by Ohm's law from the power consumption and the power supply voltage.

Tungsten alloy plates are sintered to produce tungsten alloy rods, tungsten alloy discs, billets, rolled or crimped into rods, plates, etc. Smaller sizes are drawn later.

Tungsten, a metallic element. Atomic number 74, atomic weight 183.84. Steel gray or silver-white, with high hardness and high melting point, and is not eroded by air at room temperature;

Tungsten alloy is an alloy composed of tungsten as the base and other elements. Among metals, tungsten has the highest melting point, high temperature strength and creep resistance, as well as thermal conductivity, electrical conductivity and electron emission properties.

Tungsten wire tap is one of the standard tools for machining cylindrical and conical internal threads. It has a simple structure and is easy to use, so it is widely used. The essence of a tungsten wire tap is a screw that is longitudinally grooved to form cutting edges and flutes.

Standard end mills are available with coarse and fine teeth. The number of teeth of the coarse-tooth end mill is 3 to 4, and the helix angle β is larger; the number of teeth of the fine-tooth end mill is 5 to 8, and the helix angle β is smaller.