| 摘要 |
FIELD: medical engineering. SUBSTANCE: stethophonendoscope has otic olives with headband spring and sound ducts coupled to head body through branch pipe. Head body is provided with open and closed membrane funnels. Part of branch pipe has spherical surface, and it moves over spherical space of head body. When in operating position, this part is arranged coaxially with operating funnel channel. Body with internal spherical space is provided with through recesses on its surface. EFFECT: simplified adjustment for operation, enhanced reliability. 2 cl, 4 dwgs
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