... Pair （立体声）配对，比较 PAL phase alternation line 逐行倒相彩色电视制式 PAM pole amplitude modulation 极点调幅 ...
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pole amplitude modulation motor 极幅调制电动机
pole-amplitude modulation 极幅调制
Compared with PAM (pole Amplitude Modulation) theory, the minimum symmetric group theory is more effective in implementation of ac machine pole-changing winding's non-regular arrangements.
与PAM(极幅调制)理论相比，最小对称组理论可更有效地实现交流电机变极绕组非正规方案。
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