【摘 要】
：
Gas is the blood of modern industry. It is in extensive use in almost every sector of the national economy, such as machinery, petroleum, chemical engineering, fire protection, medical care, energy, urban construction, food, metallurgy, electronics, autom
论文部分内容阅读
Gas is the blood of modern industry. It is in extensive use in almost every sector of the national economy, such as machinery, petroleum, chemical engineering, fire protection, medical care, energy, urban construction, food, metallurgy, electronics, automobile, and residential living. It is safe to say that where there is industry, there is gas.
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