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.
医院不得不用煤气炉、锅炉、发电机、太阳能和蜡烛来应对。
Hospitals must use gas stoves, coal-fired boilers, fuel generators, solar power and candles.
燃用煤粉的火室燃烧锅炉一般应装有入炉风量表。
Pulverized coal fired boiler in the firebox usually must be equipped with wind flow meter.
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