The relationship between percentage sizing and percentagecover in hi-pressure sizing process is analysed. It's suitable to use double sizing boxes if the percentagecover is about 70%.
分析高压上浆中上浆率与浆纱覆盖率的关系，指出覆盖率达到70 %使用双浆槽为宜；
2
By the beginning of June, the ice cover-as defined by the percentage of ocean covered by at least 15% floating ice-had dropped far below what is usual for the time of year.
6月初，覆冰率(定义为洋面浮冰率15%以上的水域比例)远低于常年水平。
3
Percentage of forest cover in different historic periods of china.