| 摘要 |
PROBLEM TO BE SOLVED: To provide a scrubbing brush having better penetrability into a conduit. SOLUTION: This scrubbing brush 10 has a brush part 11 attached to a sheath part 12 to be inserted into a conduit. The distal end of the sheath part 12, which first enters into the conduit, is made more flexible and the proximal and is made less flexible than the rest.
|
