proof of mathematical induction 数学归纳法的证明
The mathematical induction is a method of proof often applied in mathematics. The most common and the most famous inductive way is the simple directed path.
数学归纳法是数学中常常用到的一种证明方法，最常见而最为人们所熟知的归纳途径是简单的有向路。
Driving Method:commom induction motor, flame proof induction or frequency flame proof motor. The installation of motor has B3, B5 two kinds.
驱动方式：普通异步电动机、隔爆型异步电动机或变频防爆。电机安装分B3、B5二种。
The characteristics and the steps to be taken in designing of new series for high voltage flame proof three phase induction motors are discussed.
阐述了新系列高压隔爆型三相异步电动机的特点和设计所采取的措施。
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