face mask

• Helmet with face mask is required
  需加上头盔和面罩
• One - piece suit + face mask
  一体式伪装服+面罩。
• Wear a face mask and wash hands
  戴口罩勤洗手
• Specification for full face mask assemblies for use in contaminated atmospheres
  污染大气条件下使用的全面罩组件规范
• Respiratory protective devices - full face masks - requirements , testing , marking
  呼吸保护装置.全面罩.要求试验标记
• Respiratory protective devices - full face masks - requirements , testing , marking
  呼吸保护装置.全面罩.要求试验标记
• Abiological protective respirator with equal protection level of the half face mask
  一种达到面具防护水平的生物防护口罩
• Wear glove and face masks when handling droppings and secretions of birds
  处理禽鸟的排泄物或分泌物时需戴上手套及口罩。
• Wearing a face mask properly offers protection against respiratory tract infections
  正确使用口罩可以预防呼吸道受感染。
• We could issue face masks to all students ， we could close down all schools
  我们可以向学生派发口罩，或要求所有学校停课。