suction area(烧结机的: Sinter machine speed control to ensure that sintering is completed close to the discharge end of sinter strand (in the penultimate wind box) thereby, utilizing the maximum possible suction area. 对烧结机速度进行控制，保证烧结过程在接近机尾卸矿端(即在倒数第二个风箱处)结束，以便充分利用抽风面积。)
fume extraction system(The electric arc furnace fume extraction system is being upgraded and five tempering furnaces being rebuilt in Lauderdale Steel. 劳德代尔钢公司的一座电弧炉排烟系统正在升级改造，五座回火炉正在改建。)
