1. And in this respect, judg ing of the three conventional types of boiler level controls by performance merits, the authors suggest that the single-element control best suit medium or small boilers.
    继而对单、双和三冲量等三种控制方案作了比较，建议对中、小型燃煤工业锅炉的汽包水位控制以单冲量调节为宜。

2. Supercharged boilers suit the demand on heavy battleships''power plants.
    增压锅炉是适合于大型水面舰艇的主动力装置。