duplicationn.复制;副本
duplication between channels道间一致性
duplication of digestive tract消化道重复畸形
duplication test in still water静水复演
duplication of alimentary tract胃肠道重复畸形
duplication of similar projects重复建设
duplication of punched card file复制穿孔卡面档
duplication of natural condition仿造天然环境
duplication of kidney and ureter重肾双输尿管