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hierarchical system

automat. ★ 递阶系统
econ. 层次系统
oil 分层系统
tech. 分层结构系统
telecom. 等级体系; 层次体系; 分级系统
hierarchical system
: 47 phrases in 12 subjects
Artificial intelligence1
Automobiles2
Cytogenetics1
Earth sciences1
Electronics16
Hydroelectric power stations1
Information technology7
Multimedia1
Project management3
Space6
Technology5
Telecommunications3

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