| 摘要 |
<p>A thin portion (3313) is provided near an opening of a bag body (2) to a main body (3311) of a belt-like base (331) connected to an engagement portion (31). The thin portion (3313) is provided between a thick first projecting portion (3312) and a thick second projecting portion (3314). The thin portion (3313) is thinner than the first projecting portion (3312) and the second projecting portion (3314). On the thin portion (3313), ribs (3313A) are provided in plural lines.</p> |
