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半圈 bànquān
gen.	halfway
agric.	hemicycle (hemicyclus)
athlet.	semi-circle
busin.	half coil
el.mach.	half turn
tech.	half wraps

半圈: 66 phrases in 16 subjects

Air defense	1
Architecture	1
Athletics	5
Automobiles	2
Aviation	1
Business	1
Electric machinery	7
Electronics	3
Figure skating	2
General	3
Hydroelectric power stations	2
Rail transport	2
Sports	1
Technology	31
Telecommunications	2
Textile industry	2