Engineering, 21.12.2020 14:00 fattypickeltoefungus
Определите дневную дозу шума для рабочего, который подвергается воздействию шума в 90 дБА в течение 2 ч и 95 дБА в течение 6 ч. Пороговое значение 80 дБА
Answers: 2
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Engineering, 04.07.2019 18:10
Coiled springs ought to be very strong and stiff. si3n4 is a strong, stiff material. would you select this material for a spring? explain.
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Определите дневную дозу шума для рабочего, который подвергается воздействию шума в 90 дБА в течение...
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