This paper discusses the source of heat for spot welding and the theory of diffusion welding of brass and red copper.
探讨了点焊热量的来源和黄铜与紫铜的扩散焊机理。
Methods; To study the relationship between signal attenuation and temperature or time by the theory of diffusion movements on classical physics.
方法：用经典物理学的扩散理论探讨扩散运动引起的信号衰减与温度、时间的关系。
The formulas derived from the theory of diffusion current show that the so-called dilatancy-magnetic effect caused by ground water diffusion is also very small.
按照渗滤电流理论推出的公式表明，由地下水渗滤作用引起的所谓膨胀磁效应也是很小的。
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