Black tin coating was prepared by multi-arc ion plating technology and wear resistance corrosion resistanceheat-proof property and absorption property of solar spectrum were also discussed.
Heat can be precisely determined by sourcing a current accurately through a known resistance. Heat can also be introduced by a standard chemical reaction.
精确标定热量的方法采用向已知的电阻送入一个准确的电流，还可以用标准的化学反应进行加热来确定热量。
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PC board with pervious to light quality, impact resistance, heat insulation, weather resistance, prevent dewing excellence, flame retardant, sound insulation and processing function.