Yet a number of inventions have proved successful in converting what you already have, to a clean and more economicalpower machine.
而且许多的发明已经被成功的被证明转变了你们曾经的生活态度，走向一个清洁而且也更经济的能耗设备。
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In power system, enhancing and maintaining synchronous generators stability is one of the basic conditions to ensure safe and economicalpower system operation.
Rational planning of local reactive compensation and transformer capacity is very important for demand side management to reduce power losses and improve the economicalpower system operation.