| 摘要 |
The instrument (10) has a shaft comprising shaft part (12), and a lens (14) comprising another shaft (40). The shaft part and the lens are movable together such that the lens projects over the former shaft in a position of the latter shaft, and a distal end (23) of the former shaft lies at a height of a distal end (41) of the latter shaft in another position of the latter shaft. The cross sections of the shafts are coordinated so that the shafts have a round, oval cross section. One of the shafts comprises an instrument channel, and a guide is arranged for the latter shaft. |
