The soilsodium forms and content of 36 samples were investigated in south centre area of Hebei.
对河北省中南部棉区36个地块土壤钠形态和含量进行了测定。
2
The fatigue life of cement-sodium-silicate-grouted soil is considerably affected by loading amplitude and frequency, but the effect of former is stronger than that of latter.
荷载振幅与荷载频率直接影响着水泥加固土的疲劳寿命，但荷载振幅比荷载频率对疲劳寿命的影响大得多。
3
Polystyrene sulfonic acid and its sodium salt were prepared with old froth as water treatment medicinal preparation and the soil modifier.