| 摘要 |
<p>The instrument has an instrument head (2) allowing an examination with the instrument and provided with a first face and a second face. An opening is arranged on the first face of the instrument head. A window (12) is arranged on the second face of the instrument head. A base surrounds the instrument head. The instrument head is extended by a narrower portion surrounding a connection between the head instrument and a handle of the instrument. The instrument head is extended from a head insertion opening. The instrument is provided with a sheath that is made of opaque material and tissue type of synthetic or natural fibers, or polymer impregnated fabric, nonwoven fabric, felt, plastic or silicone.</p> |
