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supporting document
busin.	单据; 单证; 附件
fin.	单据 (action); 证明文件 (action); 辅助单据 (action)
IMF.	辅助文件; 说明文件
interntl.trade.	原始单据文件; 证明文件
securit.	辅助性文件; 原始单据
supporting documents
commer.	辅助附加单据
econ.	原始单据
tech.	证明文件; 单据

supporting document: 3 phrases in 3 subjects

China	1
General	1
Securities	1