据外媒报道，来自美国威斯康星州的Roving Blue公司在Overland Expo East展会上，展示了一支能净化饮用水的臭氧“钢笔”——O-Pen。这支神奇的“钢笔”利用臭氧消灭细菌、原生动...
, according to foreign media reports from the American state of Wisconsin Roving Blue company in Overland Expo East exhibition that shows a ozone can purify drinking water "Pen" - O - Pen. The magic of "pen" using ozone destroy bacteria, the vivid...
