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вакуум-релеstresses
nautic. vacuum breaker; pressure vacuum breaker (openmindead); pv breaker (openmindead)
shipb. vacuum breaker (прибор для остановки турбины в случае недостаточного вакуума)
therm.eng. low-vacuum control; low-vacuum load-tripping device
вакуум-реле: 2 phrases in 2 subjects
Measuring instruments1
Nautical1