Hangzhou oxygen generator stores? Hangzhou where can be filled with oxygen?

Hangzhou a lot of places are sold, zhejiang one zhejiang two hospital side too much, choose it. Oxygen filling, oxygen machine is not necessary to fill, is to produce oxygen, cylinders of medical oxygen is the factory to fill the chemical oxygen, this is included in the management of drugs. Industrial oxygen can not be sucked. There is a difference between the two, be sure to ask, don't be fooled