butane flame methanometer [矿业] 丁烷火焰瓦斯检定器 ; 丁烷火焰连续记录

acoustic methanometer 发声沼气检定仪

laser methanometer 激光沼气测定仪

catalytic methanometer 催化沼气测定仪

infrared methanometer 红外线沼气测定仪

interference methanometer 干扰式沼气检定仪

sigma recording methanometer 瓦斯火焰连续记录仪 ; 丁烷火焰瓦斯检定器

MSA methanometer MSA 型沼气检定仪

Ringrose pocket methanometer 里因罗斯袖珍沼气检定仪