| 摘要 |
The sheath has a set of sections (30) each including a flange (31) and an enveloping part (32) extending radially towards the exterior from respective ends of each section. The sections are connected in series so as to turn under an effect of an engagement of the flange with an inner zone of the part (32) of an adjacent section. An end unit (20) has a widened end hole (21) in which the end of one of the sections is inserted, and another end unit (40) has an opening whose outer periphery is in contact with the enveloping part of the other end of the section. |
