And the introduction of ac Variable Frequency Speed Regulating technology in the petroleum domain has become a effective action to conserve energy and improve the product quality.
而在石油领域中引入交流变频调速技术已成为节能以及提高产品质量的有效措施。
The key technology of AC speed regulating is SPWM control technology.
交流调速的关键技术在于SPWM控制技术。
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