论述了蒙特卡洛方法的数学原理，并结合实例阐述了在天然气储量计算过程中各计算参数实际分布产生随机变量抽样方法。
This paper expounds the mathematical theory of Monte Carlo method, and the random variable sample method of parameters in the calculation process of gas reserves in conjunction with examples.
文章介绍了逻辑加密卡sle4442工作原理及其在肺活量计上的具体应用过程，并设计了一种通用的IC卡接口电路。
This paper introduces the working principle of logic encryption card SLE4442 and its concrete application at spirometer, and also the design of a general IC card interface circuit.
作为新产品的环式离心流量计因结构内部无转动部件，故不易卡、堵，压力损失小，维修工作量少。
With low pressure loss and simple repair, the annular-type centrifugal flowmeter, being without rotary element installed in it, can not be stuck and block up.
作为新产品的环式离心流量计因结构内部无转动部件，故不易卡、堵，压力损失小，维修工作量少。
With low pressure loss and simple repair, the annular-type centrifugal flowmeter, being without rotary element installed in it, can not be stuck and block up.
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