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universal set
IT 全集; 交直流收音机; 万有 〔通用〕集
math. 宇集合
tech. 万有集; 通用接收机
telecom. 交直流两用收音机
universal set: 16 phrases in 7 subjects
Aviation1
Business2
Electronics4
Information technology4
Space1
Technology3
Weightlifting1