positive utility standard
...正效用标准，劳动力使用价值，技术使用价值， [gap=635]Key words: Customer delivered value standard; Positive utility standard; Usage value of labor power; usage value of technology; ..
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positive utility standard
正效用标准
以上为机器翻译结果，长、整句建议使用 人工翻译 。
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The standard throttle according to the utility model can settle the problem that the throttle of different positions and positive and negative throttle can not be replaced at root.
本 实用新型可以从根本上解决不同地点风门及正反向风门不能相互替换的难题。
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