| 摘要 |
<p>An occluding end part (115) of a cylinder (111) is arranged further towards the distal end side from a minimum-diameter portion (113) in the direction of insertion of a piston (121) with respect to the cylinder. The occluding end part (115) has an equal-to-minimum diameter portion (117a) situated in a section of the occluding end part and having the same inside diameter as the minimum-diameter portion, and a partly expanded-diameter portion (117b) situated in another section of the occluding end part and having an inside diameter expanded to greater size the inside diameter of the minimum-diameter portion (113).</p> |
