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空心 kōngxīn
gen.	hollowly; open-hole
agric.	pithiness
auto.	hollowing
earth.sc.	hollow
met.	air-core
space	cavity
steel.	shell
tech.	air core; hollowness (度)
wood.	hollow core
线圈/变压器空心 kōngxīn
auto.	air core

空心: 2330 phrases in 71 subjects

Advertising	1
Agriculture	17
Air defense	30
Angling hobby	2
Animal husbandry	3
Architecture	64
Astronautics	1
Automobiles	39
Aviation	282
Basketball	7
Bridge construction	25
Business	7
Cartography	1
Chemistry	23
Chess	1
Compressors	5
Computer numerical control	1
Construction	13
Desert science	4
Drilling	2
Earth sciences	46
Ecology	5
Electric machinery	26
Electronics	97
Engineering geology	14
Environment	2
Exhibitions	2
Explosives and Explosive Ordnance Disposal	5
French	4
General	145
Geology	1
Hydroelectric power stations	14
Industry	1
Isolation	1
Italian	1
Latin	1
Management	1
Mechanic engineering	2
Metallurgy	104
Mining	2
Multimedia	1
Name of organization	1
Nautical	1
Oil / petroleum	42
Pharmacology	2
Plastics	27
Polygraphy	3
Polymers	6
Portuguese	1
Project management	3
Rail transport	13
Refrigeration	3
Roll stock	2
Rowing	1
Shipbuilding	12
Space	135
Sports	3
Steel production	4
Superconductivity	1
Surfing, windsurfing, SUP surfing	3
Surgery	2
Technology	932
Telecommunications	1
Textile industry	28
Thermal Energy	1
Transport	1
United Kingdom	3
United States	87
Water resources	2
Wind Energy	4
Wood processing	3