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bolt head
dril.	长颈烧瓶
el.mach.	螺钉头
shoot.	机头
wind.	螺栓头
bolt-head
gen.	蒸馏用长颈烧瓶
archit.	枪机头
bridg.constr.	螺栓头

bolt head: 120 phrases in 21 subjects

Agriculture	2
Architecture	2
Automobiles	25
Aviation	6
Bridge construction	4
Business	2
Chemistry	1
Compressors	3
Construction	5
Drilling	2
Electronics	1
Exhibitions	1
General	1
Hydroelectric power stations	5
Metallurgy	4
Oil / petroleum	1
Rail transport	1
Shipbuilding	2
Shooting sport	2
Technology	47
Wind Energy	3