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инженер-сантехник stresses
construct.	sanitary installation engineer
ecol.	drainage engineer
tech.	heating and ventilation engineer; plumbing engineer; sanitary engineer; heating-and-ventilation engineer
инженер – сантехник
ecol.	sanitary engineer

инженер-сантехник: 2 phrases in 2 subjects

Military	1
Weapons of mass destruction	1