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为了保证涨圈在使用中有足够的弹性,加工好的每个涨圈应进行检验。按检验要求,当搭口连续三次张开12～13毫米涨圈不发生永久变形和裂纹就算合格。
In order to ensure that the ring is flexible enough in service, each completed ring should be tested. According to test requirements, when the opening three consecutive open 12 ~ 13 mm ring does not occur permanent deformation and crack even qualified.