国产学生真实初次破初视频

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Controlled Evaluation of Copper-Silver Ionization in Eradicating Legionella Pneumophila from a Hospital Water Distribution System

This study, published in The Journal of Infectious Diseases in 1994, evaluated the success of copper-silver ionization in eliminating Legionella from a hospital contaminated with the bacteria on a short-term basis as well as its residual effects after the system was deliberately shut off.

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国产学生真实初次破初视频
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