Inflatable balloon for use as speech therapy aid
作者： Barbara Rehm , Susanne Codoni , Ulrike Hörstel
DOI:
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摘要: The balloon (1) has several mouth pieces for its inflation. Each mouthpiece a non-return valve and is formed, so that various degrees of difficulty inflation can be chosen. base part containing the valve, conical (8) fitted to breathing air outlet part, tube inlet.
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