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                                            | 建筑通风风量调节阀 The valve for building ventilation system
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                                            | 蓄冷空调工程技术规程(附条文说明) Technical specification for cool storage air-conditioning system
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                                            | 铝电解厂通风与烟气净化设计规范 Code for ventilation and fume purification design of aluminium smelters
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                                            | 通风管道技术规程(附条文说明) Technical specification of air duct
 价格:¥13.00
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                                            | 集中空调通风系统清洗行业技术管理规范 Technical management standard for central air-conditioning and ventilation system cleaning industry
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                                            | 非金属及复合风管 Nonmetallic and foil-insulant composite duct
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                                            | 核级空气净化部件安装用排架 Frames for mounting nuclear air cleaning components
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                                            | 通风空调风口 Air outlets and inlets for ventilation and air conditioning
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                                            | 不燃型无机玻璃通风管道 Non-combustibility ventilating pipes of inorganic material and fiberglass
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