| 摘要 |
A bolt brush includes a housing, a scraper and a ring plate. The housing has a holding space which is provided with an opening at an end and emplaces the scraper, an inner wall of the housing, close to that opening, is surrounded with a ring groove, and a side of the scraper is provided with plural brush hairs. The ring plate is locked in the ring groove, a side of the ring plate is an opening, and more than one pick-up member is formed close to that opening.
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