1. C80 high performance concrete was developed in the construction of Hetai Building based on the analysis to the function of fly ash in C80 high performance concrete.
本文通过粉煤灰在C80高性能砼中的作用分析，在和泰大厦工程中配制出C80高性能粉煤灰砼。
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2. The application of technology for gold purification by extraction is introduced with gold Refinery of Hetai gold Mine. The process flow and technology number is studied.
介绍了萃取法精炼黄金技术在河台金矿黄金精炼厂的应用情况，并对其工艺流程和技术参数进行探讨。
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3. The application of technology for gold purification by extraction is introduced with gold Refinery of Hetai gold Mine. The process flow and technology number is studied.
