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直管 zhíguǎn
avia.	run pipe
met.	straight tube
oil	straight pipe
plast.	plain pipe
tech.	ascending pipe; ascending tube; piling pipe; piling tube
直〔上升，注人，压人，增压〕管
tech.	ascending pipe

直管: 641 phrases in 60 subjects

Agriculture	4
Air defense	2
Anatomy	1
Animal husbandry	2
Architecture	3
Automobiles	9
Aviation	31
Biology	2
Biotechnology	1
Bridge construction	1
Business	15
Chemistry	6
China	4
Commerce	3
Compressors	3
Computers	4
Construction	2
Drilling	15
Earth sciences	6
Ecology	3
Economy	5
Electric machinery	1
Electronics	43
Engineering geology	5
Explosives and Explosive Ordnance Disposal	2
Finances	1
General	26
Genetics	1
Geophysics	3
Hydroelectric power stations	10
Information technology	3
Latin	2
Management	2
Mechanic engineering	2
Mechanics	7
Metallurgy	65
Multimedia	1
Nautical	10
Navigation	4
Nursing	5
Oil / petroleum	34
Oil processing plants	1
Otorhinolaryngology	1
Physics	1
Plastics	5
Project management	3
Radio	1
Rail transport	4
Refrigeration	9
Reproductive biology	11
Securities	1
Shipbuilding	10
Solar power	1
Space	9
Sports	1
Steel production	1
Surgery	6
Technology	221
Telecommunications	1
Textile industry	5