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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.
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".
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 129-foot-6-inch-long (39.47 m) 737-800 has two overwing exits on each side. Hapag-Lloyd received the first in April 1998. The Boeing 737-800 is a stretched version of the 737-700. It replaced the 737-400 and competes primarily with the Airbus A320. The 737-800 seats 162 passengers in a two-class layout or 189 passengers in a one-class layout.
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 ...
800 MHz – 2.266 GHz Socket 479: 90 nm, 130 nm 5.5 W – 27 W 1 400 MHz, 533 MHz 32 KiB 1 MiB – 2 MiB N/A Pentium D/EE: 8xx 9xx Smithfield Presler: 2005–2008 2.66 GHz – 3.73 GHz Socket T: 65 nm, 90 nm 95 W – 130 W 2 533 MHz, 800 MHz, 1066 MHz 16 KiB per core 2×1 MiB – 2×2 MiB N/A Pentium Dual-Core: E2xxx E3xxx E5xxx T2xxx T3xxx
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