| 摘要 |
A scirroscope includes a pipe-shaped shell tube, a channel for feeding water or passing a treatment instrument therethrough, an optics tube in which an observation optical system is disposed, and a bundle of optical fibres which defines an illumination optical system. An elastic member covers at least partly at least one of the internal periphery of the shell tube and the external periphery of the channel, the optics tube and the fibre bundle.
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