展望了电子级磷酸的发展前景，并提出了电子级磷酸生产装置建设意见和建议。
Finally, the development prospects are predicted, and some Suggestions for the electronic grade phosphoric acid device construction are also put forward.
介绍了国内外醋酸乙烯供需现状和市场前景，提出了关于醋酸乙烯装置建设的几点思考。
The article introduces supply & demand status and market prospect of vinyl acetate both home and abroad and puts forward several considerations about its unit construction.
偏心金属硬密封球阀已在一些新装置建设和老装置改造中取代了一部分闸阀而得到应用。
Now gate valves have been replaced by eccentric metal hard seal ball valves in the construction of some new unit and old unit revamping.
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