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环形 huánxíng
gen.	annuliform; dount
avia.	toroidal
gymn.	annular; king-like
hydroel.st.	ring; torus
met.	ring shaped crucible
space	doughnut (室)
tech.	circline; ring form; ring type
telecom.	doughnut
wind.	circlip
环形物，室，箱 huánxíng
gen.	doughnut
环形状态 huánxíng
gen.	annularity
环形室，线圈，圆纹曲面 huánxíng
gen.	torus
环形管道 huánxíng
water.res.	looping in a pipe system

环形: 2437 phrases in 102 subjects

Advertising	1
Agriculture	67
Air defense	44
Animal husbandry	15
Antennas and waveguides	1
Architecture	25
Athletics	3
Automatic control	1
Automobiles	145
Aviation	36
Biotechnology	4
Bodybuilding	1
Bridge construction	10
Business	9
Cartography	2
Chemistry	31
Communications	3
Compressors	13
Computer networks	7
Computers	4
Construction	13
Cycle sport	3
Cycling other than sport	1
Cytogenetics	2
Dermatology	5
Desert science	3
Drilling	29
Earth sciences	15
Ecology	3
Economy	4
Electric machinery	35
Electronics	202
Energy industry	2
Engineering geology	11
Exhibitions	3
Explosives and Explosive Ordnance Disposal	27
Figure skating	23
Football	1
General	99
Genetics	6
Geology	1
Geophysics	11
Golf	4
Gymnastics	1
Health care	1
Horticulture	1
Hydroelectric power stations	29
Ichthyology	1
Information technology	21
Latin	7
Life sciences	2
Management	3
Marketing	1
Mathematics	1
Mechanic engineering	1
Mechanics	8
Metallurgy	150
Morphology	1
Mountaineering	1
Multimedia	2
Nautical	5
Navigation	2
Nuclear and fusion power	4
Nursing	12
Oil / petroleum	83
Otorhinolaryngology	2
Physics	1
Plastic surgery	3
Plastics	55
Polo	1
Polygraphy	1
Polymers	3
Project management	5
Racing and motorsport	3
Radio	1
Rail transport	10
Refrigeration	14
Reproductive biology	5
Road works	2
Rowing	3
Securities	1
Shipbuilding	17
Shooting sport	1
Skydiving	6
Space	116
Sports	3
Statistics	1
Steel production	2
Submarines	1
Superconductivity	1
Surgery	7
Technology	806
Telecommunications	23
Textile industry	46
Thermal Energy	1
Transport	3
United Nations	3
Veterinary medicine	4
Water resources	2
Welding	2
Wind Energy	19
Wushu	1