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单语范例（未经PONS编辑处理）
It is similar in principle to the safety catches used on many handguns.
en.wikipedia.org Do you really think it will have modern safety catches?
www.theboltonnews.co.uk He claimed he was holding it under his top with the safety catch engaged when he dropped it, causing it to fire.
www.independent.ie Security concerns could be overcome with safety catches.
www.stuff.co.nz These included the traditional pin and safety catch and, later, clutch-back fasteners.
en.wikipedia.org