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常开 chángkāi
auto.	NO/no.= normally open; normally open (N.O)
met.	normal open
space	normally opened; normally open (的)
wind.	normally open
常开触点 chángkāi
avia.	normally open
常开的 chángkāi
chem.	normally open
常开阀 chángkāi
met.	normal open

常开: 238 phrases in 45 subjects

Agriculture	13
Automobiles	7
Aviation	6
Business	7
China	1
Commerce	1
Communications	2
Compressors	4
Construction	2
Drilling	1
Earth sciences	5
Economy	21
Electric machinery	8
Electricity	1
Electronics	23
Engineering geology	1
Exhibitions	1
Explosives and Explosive Ordnance Disposal	3
Finances	4
Footwear	1
General	3
Genetics	1
Geophysics	2
Household appliances	1
Hydroelectric power stations	8
Information technology	1
International Monetary Fund	5
International trade	8
Mechanics	1
Metallurgy	4
Name of organization	1
Nautical	1
Navigation	1
Nuclear and fusion power	1
Oil / petroleum	6
Otorhinolaryngology	3
Project management	15
Rail transport	3
Space	6
Technology	40
Telecommunications	2
Textile industry	5
United Nations	1
Water resources	4
Wind Energy	3