Since the device is sealed in the constant pressure water supply, Entirely keep the water quality sanitation tagging, Because do not contact with air, Avoid secondary pollution and vandalism.
Apart from the secondary water supply systems, the drainage systems and the air-raid shelters, no significant difference was found in the positive rates between the central area and the marginal area.
除二次供水、市政排水设施和防空洞外，中心城区与边缘城区蚊孳生阳性率无明显差别。
3
The structure of spraying drying chamber, filtering chamber, fluid-bed and secondaryairsupply system has been improved greatly. It can appear the features of spraying drying deeply.