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老工人
tech.	old hand; veteran worker
老〔熟练，富有经验的〕工人
construct.	veteran worker

老工人: 35 phrases in 17 subjects

Architecture	2
Automobiles	1
Aviation	2
Business	3
Chemistry	4
Economy	2
Electric machinery	1
Engineering geology	1
Explosives and Explosive Ordnance Disposal	1
General	1
International trade	1
Metallurgy	1
Oil / petroleum	1
Plastics	5
Polymers	1
Space	1
Technology	7