方法结合我们参加救护的体会并参考国内外相关资料，提出有效措施。
Methods Reviewing the data collected from foreign nations and our country, and combining with our experience in rescue, we put forward effective measurements.
本文根据对减水剂研究、开发和应用中的体会并结合国内外的研究资料，从理论和实践上对临界掺量问题加以分析和评价。
According to the research, development and application of superplasticizer, and documents around the world, the critical values is analyzed and evaluated theoretically and practically.
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