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primary winding
agric.	原线圈; 初级线圈线组
auto.	点火线圈初级绕组; 初级一次线圈
electric.	初级线圈变压器的
geophys.	原绕组; 初级线圈
met.	初级绕组; 一次绕组
railw.	原边绕组
tech.	原边线圈
transp.	原〔一次,初级〕绕组

primary winding: 3 phrases in 2 subjects

Electronics	2
Technology	1