Abstract ［Objectives］ This study was conducted to understand the relationship between soil pH and soil physical and chemic......

介绍了灰板纸的生产流程、工艺条件、成纸的技术指标。对生产中易出现的问题通过调整原料配比,改善板纸的松厚度,稳定产品质量。 ......

为探究吕家坨井田地质构造格局,根据钻孔勘探资料,采用分形理论和趋势面分析方法,研究了井田7......