据了解 ,为解决中老年人和患者在家吸氧换气难的问题 ,目前北京已有北京东方医用气体厂、北京太平洋公司、北京氧源商贸中心等多家生产、贸易公司从事 8升、 12升、 40升瓶装医用氧送换氧气上门服务 ,尤其 8升瓶装医用氧 ,昼夜服务 ,不休节假日。用户需要时 ,只需在家打个电话 It is understood that in order to solve the problem of difficulty in absorbing oxygen between the elderly and patients at home, Beijing currently has a number of production and trading companies including Beijing Oriental Medical Gas Factory, Beijing Pacific Company and Beijing Oxygen Source Business Center, Liter, 40 liters bottle of medical oxygen to send oxygen home services, especially 8 liters bottle of medical oxygen, day and night service, endless holidays. When the user needs, simply make a call at home