Is this gentleman still using oxygen tanks? You can consider changing the oxygen generator. You don't have to endure the pain of frequent refueling.
Of course, at present, the market is full of fish and pearls. When buying, you have to keep your eyes open and choose carefully.
Recommend a good national chain store. There is a shop next to Zhejiang No.1 Hospital, at No.62 Dafangbo Road, Zhida.
Sell medical equipment, including oxygen cylinders, oxygen generators, three high products, wheelchairs and a series of middle-aged and elderly products.
I can see clearly in the brochure that there are quite a lot of designs in their shop. Service enthusiasm.
Interested parties can consult. On the phone, the brochure says: domineering sparkling wine Mitsubishi sees a doctor.