By use of magnetic balance which is general physical experiment instrument, a simple and new method of measuring the charge-mass ratio of electron mass developed.
使用常用物理实验仪器磁天平，开发出用于近代物理实验测量电子荷质比的简易新方法。
Two important parameters-balance radiuses and space charge force balance radius is calculated under neutral plasma case. The properties of electron beam transmission are discussed.
在环内中性等离子体情况下计算了传输过程中的两个重要参量——平衡半径和空间电荷力平衡半径，讨论了电子束的传输特点。
By using the electron balance, the weight of the mouse, spleen , thymus were measured, and the spleen coefficient and thymus coefficient were calculated.
运用电子秤对小鼠的体重、脾脏和胸腺重量进行了测量，并分别计算脾脏系数和胸腺系数；
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