内容介绍:
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http://www.hwenz.com/pic/伤感独bai
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声波吹灰器通过将压缩空气或蒸汽转换为高强度声波，利用声波振动使积灰因疲劳效应疏松脱落，最终被气流或重力清除
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http://www.hwenz.com/pic/散文大年夜齐100尾弄笑感情段子！尽好案牍配图.jpg
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