Qingdao Bluewing was established in 2012 and is a professional supplier of medical ventilator and anesthesia system in China. We sell related products with wide varieties, massive stock ,such as O2 sensor, flow sensor, testlug, Battery modules, and so on.Moreover, we have own engineer team, they have more than 10 years&＃39; experience in this field keep the technology in step with the famous brand in the world such as Drager, Maquet, PB . Especially, they are good at maintain the machinery, circuit board, second-hand parts have large stocks.Nice price and convenient shippment ,hope enter into strong business relationship with you