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NBN-ISO 3744-1992 8125 Acoustics Determination of sound power levels of noise sources Engineering methods for free-field conditions over a reflecting plane《声学 用声压测定噪声源声音功率级 用于自由场反射.pdf 2

NBN-ISO 3744-1992 8125 Acoustics Determination of sound power levels of noise sources Engineering methods for free-field conditions over a reflecting plane《声学 用声压测定噪声源声音功率级 用于自由场反射.pdfNBN-ISO 3744-1992 8125 Acoustics Determination of sound power levels of noise sources Engineering methods for free-field conditions over a reflecting plane《声学 用声压测定噪声源声音功率级 用于自由场反射.pdf

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NBN-ISO 3743-1992 8125 Acoustics Determination of sound power levels of noise sources Engineering methods for special reverberation test rooms《声学 用声压测定噪声源声音功率级 用于特殊混响实验室的工程法》.pdf 2

NBN-ISO 3743-1992 8125 Acoustics Determination of sound power levels of noise sources Engineering methods for special reverberation test rooms《声学 用声压测定噪声源声音功率级 用于特殊混响实验室的工程法》.pdfNBN-ISO 3743-1992 8125 Acoustics Determination of sound power levels of noise sources Engineering methods for special reverberation test rooms《声学 用声压测定噪声源声音功率级 用于特殊混响实验室的工程法》.pdf

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NBN-EN 61120-4-1994 4375 Digital audio tape recorder reel-to-reel system using 6 3 mm magnetic tape for professional use Part 4 Magnetic tape properties Definitions and methods of .pdf 2

NBN-EN 61120-4-1994 4375 Digital audio tape recorder reel-to-reel system using 6 3 mm magnetic tape for professional use Part 4 Magnetic tape properties Definitions and methods of .pdfNBN-EN 61120-4-1994 4375 Digital audio tape recorder reel-to-reel system using 6 3 mm magnetic tape for professional use Part 4 Magnetic tape properties Definitions and methods of .pdf

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NBN-EN 61120-3-1994 6250 Digital audio tape recorder reel to reel system using 6 3 mm magnetic tape for professional use Part 3 Format B《数字录音机 演播室用6 3mm磁带的磁带盘 第3部分：数据格式B》.pdf 2

NBN-EN 61120-3-1994 6250 Digital audio tape recorder reel to reel system using 6 3 mm magnetic tape for professional use Part 3 Format B《数字录音机 演播室用6 3mm磁带的磁带盘 第3部分：数据格式B》.pdfNBN-EN 61120-3-1994 6250 Digital audio tape recorder reel to reel system using 6 3 mm magnetic tape for professional use Part 3 Format B《数字录音机 演播室用6 3mm磁带的磁带盘 第3部分：数据格式B》.pdf

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NBN-EN 61120-2-1994 0625 Digital audio tape recorder reel to reel system using 6 3 mm magnetic tape for professional use Part 2 Format A《数字录音机 演播室用6 3mm磁带的磁带盘 第2部分：数据格式A》.pdf 2

NBN-EN 61120-2-1994 0625 Digital audio tape recorder reel to reel system using 6 3 mm magnetic tape for professional use Part 2 Format A《数字录音机 演播室用6 3mm磁带的磁带盘 第2部分：数据格式A》.pdfNBN-EN 61120-2-1994 0625 Digital audio tape recorder reel to reel system using 6 3 mm magnetic tape for professional use Part 2 Format A《数字录音机 演播室用6 3mm磁带的磁带盘 第2部分：数据格式A》.pdf

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NBN-EN 61118-1994 3750 Helical-scan video tape cassette using 12 65 mm (0 5 in) magnetic tape - Type M2《12 65mm（0 5in）磁带螺旋扫描盒式磁带录像系统 M2型》.pdf 2

NBN-EN 61118-1994 3750 Helical-scan video tape cassette using 12 65 mm (0 5 in) magnetic tape - Type M2《12 65mm（0 5in）磁带螺旋扫描盒式磁带录像系统 M2型》.pdfNBN-EN 61118-1994 3750 Helical-scan video tape cassette using 12 65 mm (0 5 in) magnetic tape - Type M2《12 65mm（0 5in）磁带螺旋扫描盒式磁带录像系统 M2型》.pdf

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NBN-EN 61110-1993 8750 System omega and differential omega receivers for ships Operational and performance requirements Methods of testing and required test results《船用奥米伽远程导航系统和压差奥.pdf 2

NBN-EN 61110-1993 8750 System omega and differential omega receivers for ships Operational and performance requirements Methods of testing and required test results《船用奥米伽远程导航系统和压差奥.pdfNBN-EN 61110-1993 8750 System omega and differential omega receivers for ships Operational and performance requirements Methods of testing and required test results《船用奥米伽远程导航系统和压差奥.pdf

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NBN-EN 379-1994 6250 Specification for welding filters with switchable luminous transmittance and welding filters with dual luminous transmittance《可变换光传导级的焊接保护滤光器和带2个光传导级的焊接保护滤光器的要.pdf 2

NBN-EN 379-1994 6250 Specification for welding filters with switchable luminous transmittance and welding filters with dual luminous transmittance《可变换光传导级的焊接保护滤光器和带2个光传导级的焊接保护滤光器的要.pdfNBN-EN 379-1994 6250 Specification for welding filters with switchable luminous transmittance and welding filters with dual luminous transmittance《可变换光传导级的焊接保护滤光器和带2个光传导级的焊接保护滤光器的要.pdf

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NBN-EN 378-1-1994 6250 Refrigerating systems and heat pumps - Safety and environmental requirements - Part 1 Basic requirements《制冷系统和热泵，安全和环境要求 第1部分：基本要求》.pdf 2

NBN-EN 378-1-1994 6250 Refrigerating systems and heat pumps - Safety and environmental requirements - Part 1 Basic requirements《制冷系统和热泵，安全和环境要求 第1部分：基本要求》.pdfNBN-EN 378-1-1994 6250 Refrigerating systems and heat pumps - Safety and environmental requirements - Part 1 Basic requirements《制冷系统和热泵，安全和环境要求 第1部分：基本要求》.pdf

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NBN-EN 376-1992 7500 In vitro diagnostic systems - Requirements for labelling of in vitro diagnostic reagents for self-testing《体外诊断系统，用于自测法的体外诊断剂标示要求》.pdf 2

NBN-EN 376-1992 7500 In vitro diagnostic systems - Requirements for labelling of in vitro diagnostic reagents for self-testing《体外诊断系统，用于自测法的体外诊断剂标示要求》.pdfNBN-EN 376-1992 7500 In vitro diagnostic systems - Requirements for labelling of in vitro diagnostic reagents for self-testing《体外诊断系统，用于自测法的体外诊断剂标示要求》.pdf

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