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旧时朋友结拜为异姓兄弟时，交换写着姓名、年龄、籍贯、家世的帖儿：～弟兄。
[letters of identification;become sworn brothers by exchange of papers bearing name,surname,year of birth.etc.] 旧时异姓朋友结拜为兄弟时,交换写着姓名、年龄、籍贯、家世的帖子 换帖弟兄
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