以下为句子列表：
英文: BQQ series corundum porous diffuser is a aeration device used in conventional, extended activated-sludge system for industrial and municipal wastewater treatment engineering.
中文: 产品简介：BQQ系列刚玉微孔曝气器适用于工业污水、市政污水处理工程中传统的、扩展的活性污泥处理工艺。
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英文: Develops a new type of swirling cold air diffuser and tests its performance in aspects of aerodynamics, cold air supply and noise.
中文: 摘要研制了一种旋流式低温送风口，并进行了空气动力学、低温送风及噪声测试。
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英文: Diffuser disc is produced from aluminum oxide and ceramic bonded together with high sintering temperature.
中文: 性能特点：1.曝气盘采用氧化铝磨料和陶瓷结合剂高温烧结而成。
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英文: Materials: stainless steel or plated metal, painted metal finish, white frosted glass cover / diffuser or Arclic cover/diffuser or PMMA cover/diffuser, or marble cover/ Diffuser.
中文: 材料：采用不锈钢或电镀/烤漆金属耐腐蚀性能高，玻璃罩或者压克力罩PMMA或透光云石或仿石材罩。
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英文: Productive durability test and oxygen transfer performance test in clean water per diffuser for seven kinds of diffusers were studied respectively in this paper, and serving diffusive area, air flow, varied resistance, varied resistance after stopping air
中文: 摘要对7种曝气器产品分别进行了单盘耐用性生产试验、单盘清水充氧性能试验以及对在大生产试验期间的服务面积、供气量、阻力变化、停气后阻力变化、曝气强度等方面进行了测试对比工作。
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