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铁路专用线
archit.	approach track
bridg.constr.	special spur track; accommodation railway; special purpose railroad
el.	plant service railway line; railway sidings; special service railroad; special service railway line
logist.	special railway line
railw.	industrial siding; private siding
tech.	access railway; bay-line; rail spur; railway special line; special rail; special spur line
transp.	railway siding; sidetrack

铁路专 用 线: 22 phrases in 6 subjects

Bridge construction	1
Business	1
Electronics	2
General	1
Metallurgy	5
Technology	12