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NF S90-615-1990 Wheelchairs Part 13 determination of coefficient of friction of test surfaces 《轮椅 第13部分 试验表面磨擦系数的测定》.pdf 5

NF S90-615-1990 Wheelchairs Part 13 determination of coefficient of friction of test surfaces 《轮椅 第13部分 试验表面磨擦系数的测定》.pdfNF S90-615-1990 Wheelchairs Part 13 determination of coefficient of friction of test surfaces 《轮椅 第13部分 试验表面磨擦系数的测定》.pdf

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NF S90-605-1982 Vehicles and wheelchairs for the handicapped Test device 《残疾人用车辆和轮椅 试验设备》.pdf 7

NF S90-605-1982 Vehicles and wheelchairs for the handicapped Test device 《残疾人用车辆和轮椅 试验设备》.pdfNF S90-605-1982 Vehicles and wheelchairs for the handicapped Test device 《残疾人用车辆和轮椅 试验设备》.pdf

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NF S90-603-1985 Wheelchairs Overall dimensions mass and turning space 《轮椅 总尺寸、质量和转动空间》.pdf 6

NF S90-603-1985 Wheelchairs Overall dimensions mass and turning space 《轮椅 总尺寸、质量和转动空间》.pdfNF S90-603-1985 Wheelchairs Overall dimensions mass and turning space 《轮椅 总尺寸、质量和转动空间》.pdf

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NF S31-047-1975 Acoustics Assessment of speech intelligibility distances in noisy conditions 《声学 噪音环境中语音可听清距离评定》.pdf 2

NF S31-047-1975 Acoustics Assessment of speech intelligibility distances in noisy conditions 《声学 噪音环境中语音可听清距离评定》.pdfNF S31-047-1975 Acoustics Assessment of speech intelligibility distances in noisy conditions 《声学 噪音环境中语音可听清距离评定》.pdf

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NF S31-029-2008 Acoustics - Description and measurement of physical properties of sonic bangs 《声学 声震物理性能的描述和测定》.pdf 26

NF S31-029-2008 Acoustics - Description and measurement of physical properties of sonic bangs 《声学 声震物理性能的描述和测定》.pdfNF S31-029-2008 Acoustics - Description and measurement of physical properties of sonic bangs 《声学 声震物理性能的描述和测定》.pdf

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NF S31-017-1981 Acoustics Noise measurements on watercrafts 《声学 船舶噪音测量》.pdf 6

NF S31-017-1981 Acoustics Noise measurements on watercrafts 《声学 船舶噪音测量》.pdfNF S31-017-1981 Acoustics Noise measurements on watercrafts 《声学 船舶噪音测量》.pdf

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NF S31-014-4-1997 Acoustics Laboratory tests on noise emission from appliances and equipment used in water supply installations Part 4 mounting and operating conditions for specia.pdf 27

NF S31-014-4-1997 Acoustics Laboratory tests on noise emission from appliances and equipment used in water supply installations Part 4 mounting and operating conditions for specia.pdfNF S31-014-4-1997 Acoustics Laboratory tests on noise emission from appliances and equipment used in water supply installations Part 4 mounting and operating conditions for specia.pdf

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NF S31-014-2-1995 Acoustics Laboratory tests on noise emission from appliances and equipment used in water supply installations Part 2 mounting and operating conditions for draw-o.pdf 8

NF S31-014-2-1995 Acoustics Laboratory tests on noise emission from appliances and equipment used in water supply installations Part 2 mounting and operating conditions for draw-o.pdfNF S31-014-2-1995 Acoustics Laboratory tests on noise emission from appliances and equipment used in water supply installations Part 2 mounting and operating conditions for draw-o.pdf

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NF R14-316-1959 REFLECTORS TWO POINT ATTACHMENT 《反射镜 两点固定》.pdf 1

NF R14-316-1959 REFLECTORS TWO POINT ATTACHMENT 《反射镜 两点固定》.pdfNF R14-316-1959 REFLECTORS TWO POINT ATTACHMENT 《反射镜 两点固定》.pdf

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NF R14-315-1959 REFLECTORS CENTRAL ATTACHMENT 《反射镜 中心固定》.pdf 1

NF R14-315-1959 REFLECTORS CENTRAL ATTACHMENT 《反射镜 中心固定》.pdfNF R14-315-1959 REFLECTORS CENTRAL ATTACHMENT 《反射镜 中心固定》.pdf

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