As the size of coal pillar increases, the width of neutral plane area increases. However, the speeding-up of neutral plane area occupying the width of coal pillar decreases and becomes stable.
随煤柱尺寸增加，中性面区域的宽度逐渐增大，但其占煤柱宽度比例增速降低并逐渐趋于稳定。
2
This investigation of the mechanism of premixing alum-rosin size for neutral-alkaline papermaking process focused on the mixture solution charge and particle size distribution.
中碱性造纸过程中松香明矾预混和过程的研究主要集中在混和液的电荷及粒度分布。
3
Several alkyl rosin ester rosin sizes and glycerin rosin ester rosin size were prepared and used for paper sizing under neutral alkaline conditions.