NF S31-065-1981 Acoustics Testing of architectural acoustics Determination of sound absorption coefficient and impedance in a tube 《声学 驻波管法测定标准入射角声阻抗和吸音率》.pdf

相关资源

IRS 70778-2-2018 Recommendations for determining the carrying capacity and fatigue risks of existing metallic railway bridges.pdf

IRS 70712-2018 Rail defects.pdf

IRS 50596-6-2018 Conditions for coding intermodal loading units in combined transport combined transport lines and wagons.pdf

IRS 50596-5-2018 Transport of road vehicles on wagons-Technical Organisation-Conveyance of semi-trailers with P coding or N coding on recess wagons.pdf

IESNA TM-23-2017 Lighting Control Protocols.pdf

IESNA RP-2-2017 Recommended Practice for Retail Lighting.pdf

ITU-R RAPPORT M 766-2 FRENCH-1990 Feasibility of frequency sharing between the GPS and other services《全球定位系统和其他服务之间的频率共享的可行性》.pdf

ITU-R RAPPORT M 763-3 FRENCH-1990 Signal level variation due to multipath effects and blockage by ship-s superstructure in maritime mobile-satellite service lin.pdf

ITU-R RAPPORT M 739-1 FRENCH-1986 Interference due to intermodulation products in the land mobile service between 25 and 100 MHz《由于互调产物在陆地移动服务25和100 MHz之间产生的干扰》.pdf

ITU-R RAPPORT M 319-7 FRENCH-1990 Characteristics of equipment and principles governing the assignment of frequency channels between 25 and 100 MHz for land mob.pdf

猜你喜欢

HB 2813-1976 可调镗刀杆D=15~20.pdf

HB 2814-1976 可调镗刀杆D=19-32.pdf

HB 2815-1976 可调镗刀杆D=30-52.pdf

HB 2816-1976 可调镗刀杆D=15~20.pdf

HB 2817-1976 可调镗刀杆D=19~52.pdf

HB 2818-1976 刀杆.pdf

HB 2819-1976 刀杆.pdf

HB 2820-1976 镗头尾柄.pdf

HB 2821-1976 镗头尾柄.pdf