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对船舶救生设备应定期进行维护、保养和检查,以保证救生设备处于立即可用状态,其保养检查工作包括: 1吊艇索的两系端应按不超过30个月的间隔期相互调头 2若吊艇索两端设有按时调头,任何时候由于变质或按不超过5年的间隔期(取较早者)而需要换新时,予以换新 3每周对通用应急报警系统进行试验 4每月检查救生艇属具 A. ②③④ B. ①②③ C. ①③④ D. ①②③④
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