At present, China harvesting rainwater mostly used the clay, cement mortar or concrete spread plate the building of water tanks and cisterns surface to impermeableness, as storage facilities.
目前在我国雨水集蓄中多以胶泥、水泥砂浆抹面或混凝土防渗来修建水窖或蓄水池等作为雨水存储设施。
When the calculation Hg was negative, that the pump should be in the position I inhaled storage tanks under the surface.
当计算之Hg为负值时，说明泵的吸入口位置应在贮槽液面之下。
When the calculation Hg was negative, that the pump should be in the position I inhaled storage tanks under the surface.
当计算之Hg为负值时，说明泵的吸入口位置应在贮槽液面之下。
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