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in use
commun.	在使用〔采用〕着; 使用〔通行〕着
econ.	在使用上; 使用户方面的
el.	正在使用
shipb.	使用中
telecom.	在使用中; 忙
be in + + use
commun.	…使用中; 被…使用
when in use
commun.	在工作〔使用〕时

in use : 222 phrases in 50 subjects

Advertising	4
Agriculture	6
Automobiles	12
Bridge construction	1
Business	13
Chemistry	3
China	11
Commerce	1
Communications	2
Corporate governance	1
Cosmetics and cosmetology	5
Dentistry	1
Earth sciences	2
Ecology	1
Economics	15
Electronics	3
Explosives and Explosive Ordnance Disposal	4
Finances	6
Fishery fishing industry	2
Footwear	1
General	17
Geophysics	1
Household appliances	1
International trade	5
Journalism terminology	1
Law	1
Librarianship	3
Lighting other than cinema	1
Management	1
Mathematics	6
Metallurgy	2
Name of organization	8
Nautical	3
Oil / petroleum	3
Otorhinolaryngology	1
Pest control	1
Plastics	4
Project management	7
Rail transport	1
Refrigeration	1
Road construction	1
Scientific	13
Securities	2
Shipbuilding	1
Sports	3
Stationery	1
Technology	24
Telecommunications	1
Textile industry	4
United Nations	10