Because of the high cost of wall tiling, ducting for services, lift structures and so on.
这是由于墙面镶贴瓷砖 、 设备的管沟 、 电梯结构等的造价非常高的缘故.
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A pump was built to push fresh air along the ducting into the tunnels.
为此,修筑者们建造了一台气泵来将新鲜空气沿管道系统推进隧道.
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Therefore should strengthen the ducting toward British and American cultures in English teaching.
因此,在英语教学中应加强对英美文化的导入.
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The reheated clean gas then travels back to the existing ducting and out the stack.
再热后净烟气,排至现有烟道,经烟囱排放.
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However, a good ducting needs a teacher peacetime to pay attention to a backlog.
然而, 一个好的导入需要教师平时留心积累.
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Design of frost proof, air ducting and noise reduction for reverse-flow natural draft cooling tower
逆流式自然通风冷却塔防冻导风降噪设计
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从数值计算和试验的结果看出，导风圈及网罩的结构形式，对于外机的送风的平直度、以及噪音都有影响。
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