It indicates that there are significant differences for microfibril Angle, basic density, bending strength and rateofshrinkage of poplar 63 and poplar 69 by variance analysis.
This paper has researched on different kinds of light aggregates as well as positive effect of content of light aggregate to restrained expansion rateofshrinkage compensating concrete.
方法利用测量限制膨胀率的方法观察高铝粉煤灰与硬石膏混合后对水泥砂浆试件的补偿收缩效果。
3
You can think of velocity as the rateof change in the progress curve, or the rateof growth or shrinkage of the Backlog.