煤气锅炉运行中煤气事故的发生频率较高。
The gas accident frequency in the operation of the gas boiler is higher.
全燃烧高炉煤气锅炉的火焰检测器以及FSSS的炉膛灭火保护。
Fire detector and flameout protection for FSSS in all blast furnace gas fired boiler.
几年前，住在宾夕法尼亚州米德尔敦的Ruth Trimble换掉了她中世纪风格的家里的燃油取暖设备，而改用煤气锅炉来取暖。
So Ruth Trimble basks in the warmth coming off her gas boiler, which a couple of years ago replaced the oil heat system in her mid-century home in Middletown, Pennsylvania.
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