#774554
In what class are zones are located in areas where under normal operation of equipment allocated combustible dusts or fibers which form with air an explosive mixture at a concentration of 65 grams per cubic meter.
Варианты ответа:
  • 21-th class.
  • 20-th class.
  • 22-th class.
Тематика: Автоматические системы пожаротушения и связь Пожарная безопасность Техника безопасности и санитария
Курсы в категории: Безопасность и правопорядок
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