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正号 zhènghào
busin.	positive number
hydroel.st.	positive sign
math.	plus sign
met.	plus
tech.	affirmative sign
正加号+
work.fl.	plus sign
正加号
archit.	plus

正 号: 156 phrases in 28 subjects

Agriculture	1
Air defense	9
Automobiles	4
Aviation	4
Bridge construction	4
Business	2
Communications	2
Computers	3
Construction	1
Economy	3
Electric machinery	1
Electronics	24
Forestry	2
General	5
Geophysics	2
Information technology	7
Mathematics	5
Metallurgy	3
Oil / petroleum	6
Plastics	3
Securities	1
Semiconductors	1
Space	5
Sports	2
Technology	40
Telecommunications	12
United Nations	2
Waterskiing	2