spark arrester
 火花避雷器


 Spark n.
 1. A small particle of fire or ignited substance which is emitted by a body in combustion.
    Man is born unto trouble, as the sparks fly upward.   --Job v. 7.
 2. A small, shining body, or transient light; a sparkle.
 3. That which, like a spark, may be kindled into a flame, or into action; a feeble germ; an elementary principle. “If any spark of life be yet remaining.” --Shak. “Small intellectual spark.” --Macaulay. “Vital spark of heavenly flame.” --Pope.
    We have here and there a little clear light, some sparks of bright knowledge.   --Locke.
    Bright gem instinct with music, vocal spark.   --Wordsworth.
 Spark arrester, a contrivance to prevent the escape of sparks while it allows the passage of gas, -- chiefly used in the smokestack of a wood-burning locomotive. Called also spark consumer. [U.S.]


 spark arrester
      n 1: electrical device to reduce sparking when electrical
           contacts are opened or closed
      2: a wire net to stop sparks from an open fireplace or
         smokestack [syn: sparker]