本发明具有结构简单、操作方便、价格低廉的优点。本发明既适合医疗、康复院所使用，又适合家庭使用。
The present invention has the advantages of simple structure, convenient operation and low cost, and may be used in hospital and household.
本发明具有结构简单、操作方便、价格低廉的优点。本发明既适合医疗、康复院所使用，又适合家庭使用。
The present invention has the advantages of simple structure, convenient operation and low cost, and may be used in hospital and household.
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