| 摘要 |
PROBLEM TO BE SOLVED: To provide a bag itself with a means for fastening an opening part of a dust container in a simple formation so as to maintain a dust bag set in a dust container having an annular mouth frame in a fastened state for a long time. SOLUTION: A net-shaped bag 11 made of synthetic resin is equipped with a synthetic resin string 13 for fastening the opening mouth part 22 of a dust container 20, and a slit 15 to fix a stopper ring 14 and the string 13 in a state where the string 13 is fastened to the container 20 by the stopper ring 14 formed of a soft material to maintain the string 13 in a fastened state exists between them.
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