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US5676888A Ecological quality improvement of water for domestic use 失效
国内用水生态质量改善

Ecological quality improvement of water for domestic use
Abstract:
The invention provides an apparatus for improving the water quality for hair and body care, wherein an exact impregnation ratio between CO2 and water may be maintained even at low water pressure by using a step piston 11, namely by using CO2 compressed gas cartridges which are refillable with CO2 compressed gas, and by eliminating cartridges into which water or moisture has penetrated.
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