漏失量 meaning in English

leakage
wastage

Measuring method on height of water flowing fractured zone using loses of drilling fluid
导水裂缝带高度的钻孔冲洗液漏失量观测方法
Special case of rheological index n = 1 were discussed , that velocity and flow rate equations were obtained agrees with completely crevice flow equations used both inside and outside the country
此外，还作出牛顿流体和非牛顿流体在柱塞与泵筒同心和完全偏心的情况下，漏失量与压差关系图，在其他条件相同情况下偏心时漏失量大于同心时漏失量。