The measure error is main bringed by both weight change of steel wire and emplastic resistance of medium.

测量误差主要由钢丝重量变化和介质黏性阻力产生。

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Effect of residual austenite on mechanical properties and abrasion resistance of medium Mn white cast iron was investigated.

研究了残余奥氏体对中锰白口铸铁力学性能和抗磨性的影响。

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If the electron flow takes place in a vacuum, as in the case of electronic valve, the electrons will travel at considerable speed, since little resistance is offered the medium.

如果电子在真空里流动，比如电子真空管，那么电子的运行速度非常快，因为介质对电子几乎不产生什么阻力。

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