Duplication

(noun.) the act of copying or making a duplicate (or duplicates) of something; 'this kind of duplication is wasteful'.

手打:萨拜娜

• Some of Edison's most remarkable inventions are revealed in a number of interesting patents relating to the duplication of phonograph records. 弗兰克·刘易斯·戴尔. 爱迪生的生平和发明.
• Some other method of increasing the production without lowering the quality of the printed sheet must be resorted to--and this is duplication. 佚名. 神奇的知识之书.
• This saves the duplication and multiplicity of a vast number of extra keys. 威廉·亨利·杜利特. 世纪发明.
• Later on, and as the crowning achievement in the phonograph field, from a commercial point of view, came the duplication of records to the extent of many thousands from a single master. 弗兰克·刘易斯·戴尔. 爱迪生的生平和发明.
• This is absolutely proven by the exact duplication of the pattern on sets of spoons. 佚名. 神奇的知识之书.
• Even so beautiful a process as that for the duplication of phonograph records was solemnly held by a Federal judge as lacking invention--as being obvious to any one. 弗兰克·刘易斯·戴尔. 爱迪生的生平和发明.

手打:威特