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1.引言压强的定义,为作用在单位表面积上的力。目前对这项物理量的测量已超过了20个数量级的范围。在实验室中对镍的 x 射线衍射图进行分析,能可靠地测定约1/2兆大气压,而使用电离规测量的
1. Introduction Pressure is defined as the force acting on the unit surface area. The current measurement of this physical quantity has exceeded 20 orders of magnitude. The analysis of the nickel x-ray diffraction pattern in the laboratory can reliably measure about 1/2 trillion atmospheres, and the ionization measurement