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Toll-free telephone numbers in the North American Numbering Plan have the area code prefix 800, 833, 844, 855, 866, 877, and 888. Additionally, area codes 822, 880 through 887, and 889 are reserved for toll-free use in the future. 811 is excluded because it is a special dialing code in the group NXX for various other purposes.
The 800 MHz frequency band is a portion of the electromagnetic spectrum, or frequency band, that encompasses 790–862 MHz. Being a part of the spectrum known as "UHF Bands IV and V" (i.e. 470 MHz to 862 MHz) it was allocated by the ITU to Broadcasting as the primary user in Region 1 and was used for analogue television broadcasting before ...
Calling an 800-number is free of charge. Calling a 400-number incurs a local access charge. 800-numbers are accessible only to land-line subscribers, while 400-numbers are accessible to all land-line and mobile users. 800-toll-free numbers. 800 toll-free numbers are commonly called "800 免费电话".
10 x 800 kt / 8730 kg: Unknown 1986 Yes Silo 220 m 4 UR-100N UTTKh: USSR Khrunichev Machine-Building Plant: 10,000 km 105,600 kg 6 x 550 kt / 4350 kg Active: 1977: Yes: Silo 350-500m 5 RT-2PM Topol: USSR Votkinsk Machine Building Plant: 10,500 km 45,100 kg 800 kt Active 1985 No Road-mobile TEL: 200–900 m 6 RT-2PM2 Topol-M: Russia
Hardness comparison table. Brinell HB. (10 mm Ball, 3000 kg load) Vickers HV. (5 kg) Rockwell C HRC. (120 degree cone 150 kg) Rockwell B HRB. (1/16" ball 100 kg)
The British Rail Class 800, branded as the Intercity Express Train ( IET) by Great Western Railway (GWR) and Azuma by London North Eastern Railway (LNER) is a type of bi-mode multiple unit train built by Hitachi Rail for GWR and LNER. The type uses electric motors powered from overhead electric wires for traction, but also has diesel generators ...
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