Source of global human resources think tankWhen everyone cheers the tax threshold to 5000 yuan a month (60 thousand yuan per year), many people do not know that the tax rate has changed greatly.&ldquo..

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Does environmental protection save an industrial country or destroy an industrial country? Is it the chemical or environmental protection that should be rectified?Xiaobian recently read an article say..

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Abstract: pressure vessels are widely used in daily life. Pressure vessel is a kind of high strength and high load operating tool. Once the quality problems occur, there will be a series of large-scal..

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Northeast oil has long been famous in the Chinese oil field: Daqing oil field, Liaohe oil field and Jilin oil field have transported a lot of blood for the industrial field of our country. However, th..

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