Respiratory protective devices - self - contained open - circuit compressed air breathing apparatus with half mask designed to be used with positive pressure only - requirements , testing , marking ; german version en 14435 : 2004 呼吸保护设备.设计只与增压供氧一起使用的带半罩面具
Respiratory protective devices - lung governed demand self - contained open - circuit compressed air breathing apparatus with full face mask or mouthpiece assembly for escape - requirements , testing , marking ; german version en 402 : 2003 呼吸保护器.逃生用全面罩式或口罩组件式自调需氧量自
Respiratory protective devices - self - contained open - circuit compressed air breathing apparatus with half mask designed to include a positive pressure lung governed demand valve for escape purposes only ; german version en 14529 : 2005 呼吸保护装置.逃生用包含由需求阀控制的正压呼吸器的
Respiratory protective devices - self - contained open - circuit compressed air breathing apparatus with half mask designed to be used with positive pressure only - requirements , testing , marking 呼吸保护设备.设计只与增压供氧一起使用的带半罩面具的自持式开路压缩气体呼吸设备.要求试验和标记
Respiratory protective devices - self - contained open - circuit compressed air breathing apparatus with half mask designed to be used with positive pressure only - requirements , testing , marking 呼吸保护设备.设计只与增压供氧一起使用的带半罩式面具的自持式开路压缩气体呼吸设备.要求试验和标记
Respiratory protective devices - self - contained open - circuit compressed air breathing apparatus with half mask designed to include a positive pressure lung governed demand valve for escape purposes only 呼吸保护装置.逃生用包含由需求阀控制的正压呼吸器的带半罩式面具的自持式开路压缩气体呼吸机
Respiratory protective devices - self - contained open - circuit compressed air breathing apparatus with half mask designed to include a positive pressure lung governed demand valve for escape purposes only 呼吸保护装置.逃生用包含由需求阀控制的正压呼吸器的带半罩式面具的自持式开路压缩气体呼吸机
Respiratory protective devices - lung governed demand self - contained open - circuit compressed air breathing apparatus with full face mask or mouthpiece assembly for escape - requirements , testing , marking 呼吸保护装置.逃生用装全罩式面具或口罩式组件的需氧量配套开路压缩空气呼吸器.要求试验标记
Respiratory protective devices - lung governed demand self - contained open - circuit compressed air breathing apparatus with full face mask or mouthpiece assembly for escape - requirements , testing , marking 呼吸保护装置.逃逸用带全面罩或口罩组件的满足需氧量的独立开路压缩空气呼吸装置.要求检验和标记
With stable and reliable operation , compact structure , and strong air breathing ability , it enables to enhance the stocking density for fish and prawn , flow water by stir to increase the dissolved oxygen concentration in water , and make even water temperature to improve water quality , which is an idle equipment for high - yielding aquaculture 具有工作平稳，运行可靠，结构紧凑，充气能力强，提高鱼虾放养密度，搅拌水体流动，增加水中溶氧含量，能使水温均匀达到改善水质的目的，是实现高产养殖的理想设备。
