NBN-EN 27779-1992 8125 《声音 空气中办公室计算机发出声音的测量》.pdf

相关资源

MSZ 11459 16-1980 《电视保护设备检测 声音通道声和电力的特点》.pdf

MSZ 11459 15-1980 《电视保护设备检测声音通道的规定一般标准》.pdf

八年级物理上册1.5《声音的产生和传播》预习检测北京课改版.doc

八年级物理上册2.1《我们怎样听见声音》随堂检测（新版）粤教沪版.doc

八年级物理上册2.1《我们怎样听见声音》预习检测（新版）粤教沪版.doc

E 315-1977 《声音类 声音频率的测量》.pdf

八年级物理上册2.3《我们怎样区分声音（续）》随堂检测（新版）粤教沪版.doc

八年级物理上册2.3《我们怎样区分声音（续）》预习检测（新版）粤教沪版.doc

ICONTEC 1992-1984 《声音类，相关等级，声音的相关物理属性》.pdf

生成简单声音.zip

猜你喜欢

AECMA PREN 4500-4-1996 Aerospace Series Metallic Materials Rules for Drafting and Presentation of Material Standards Part 4 Specific Rules for Titanium and Titanium Alloys Edition.pdf

AECMA PREN 4500-5-1996 Aerospace Series Metallic Materials Rules for Drafting and Presentation of Material Standards Part 5 Specific Rules for Steels Edition P 1 Corrigendum 07 05.pdf

AECMA PREN 4500-6-1996 Aerospace Series Metallic Materials Rules for Drafting and Presentation of Material Standards Part 6 Specific Rules for Filler Metals For Brazing Edition P .pdf

AECMA PREN 4501-1999 Aerospace Series Bolts Shouldered Thin Hexigonal Head Close Tolerance Shank Short Thread in Titanium Alloy Anodized with Aluminium Pigmented Coating Classifica.pdf

AECMA PREN 4502-2000 Aerospace Series Washers Flat for Riveting in Heat Resisting Steel FE-PA4901 (Multimet) Inch Based Series Edition P 1《航空航天系列.垫圈平铆钉耐热钢FE-PA4901基本系列.P1版》.pdf

AECMA PREN 4503-2001 Aerospace Series Non-Metallic Materials Textiles Test Method Determination of Water Soluble Chloride and Sulfate of Aqueous Extracts Edition P 1《航空航天系列.非金属物质纺织.pdf

AECMA PREN 4504-2001 Aerospace Series Non-Metallic Materials Textiles Test Method Determination of Flexibility of Narrow Fabrics Edition P 1《航空航天系列.非金属物质纺织品试验方法自由纤维.P1版》.pdf

AECMA PREN 4505-2001 Aerospace Series Textiles Test Method Determination of Dimensional Stability Edition P 1《航空航天系列.纺织品试验方法.P1版》.pdf

AECMA PREN 4506-1999 Aerospace Series Determination of Coefficients of Friction of Bolts and Nuts under Specified Conditions Edition P 1《航空航天系列.螺母摩擦系数和制定情况下螺母.P1版》.pdf