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What is semiconductor

There are many forms of matter, such as solid, liquid, gas, plasma and so on. We usually call materials with poor conductivity, such as coal, artificial crystal, amber, ceramics and so on, insulators. Metals with good conductivity, such as gold, silver, copper, iron, tin and aluminum, are called conductors. The material between conductor and insulator can be simply called semiconductor. Compared with conductors and insulators, the discovery of semiconductor materials is the latest. Until the 1930s, when the purification technology of materials was improved, the existence of semiconductors was really recognized by the academic community.

Automobile Headlamp Decorative Frame Mold Design Points

Automobile headlamp decoration frame is one of the most important parts on the headlamp, the appearance requirements are strict, the mold needs electroplating treatment. For the automobile headlight decorative frame mold, the following points should be paid attention to when designing:

Four varieties of black tea

China Qimen black tea, referred to as Qihong for short, is a treasure of traditional Chinese kung fu black tea.

The Advantages Of Galvanized Steels

GI is the abbreviation for Galvanized steel. GI typically refers to essentially pure zinc (>99%) continuously hot dip coated steel, PPGI refers to factory pre-painted zinc coated steel, where the steel is painted before forming, as opposed to post painting which occurs after forming. The hot dip metallic coating process is also used to manufacture steel sheet and coil with coatings of aluminium, or alloy coatings of zinc/aluminium, zinc/iron and zinc/aluminium/magnesium which may also be factory pre-painted.

The lastest container finished the loading

Our LED Bathroom Mirrors packed into the Pallet, convenient to load-- Only one and half hours we finished the loading one container.

Investment casting age hardening

To meet certain properties of investment castings, the products will be heat treated. In our casting factory, usually used heat treatment processes are hardening, tempering, annealing, normalizing, etc.

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