The keys to affect the efficiency of smoke purifying in aluminium electrolysis are discussed. 论述了铝电解烟气净化工艺及影响净化效率的几个关键因素。
It is studied on the biological characteristics of Ipomoea Aquatica,its rela-tionship of growth with the environmental factors and its effect in sewagewater purification. 本文研究了水蕹菜的生物学特征，生长与环境因子的关系，以及对污水的净化效率。
