The fly ash slag-alkali concrete is characterized by taking one valencemetallic compound as activator.
粉煤灰渣—碱混凝土的特点是以一价金属化合物为激发剂。
2
Promotion degradation mechanism of multi valencemetallic organic compounds on PE under composting conditions is studied.
选择多价金属的有机化合物为降解剂，研究了其在模拟堆肥环境中对PE的促降解规律。
3
The magnesium oxide vapor-deposition material comprises metal oxide in which the valence of the metallic element (s) is any of 3, 4 and 5 in the range of 0.01 to 6 mol %.