The concrete mixtures treated by vacuum water free can enhance the early stage strength, form release time and working efficiency.
混凝土拌和物经真空脱水处理后，早期强度提高，拆模时间提前，可提高工效。
Determination of free water for compound fertilizers is usually applied Karl Fischer method or vacuum oven method, a different extraction solvent can selected as Karl Frscher method is applied.
复混肥料中游离水含量的测定方法通常采用卡尔·费休法或真空烘箱法，用卡尔·费休法测定时又可选用不同的萃取剂。
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