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Mobile telephone numbers. [1] [2] In Vietnam, mobile phone numbers follow the format 09x-xxxxxxx or new prefixes: 03x, 05x, 07x, 08x. The first 0 is the trunk code. The next 2 digits ( 3x, 5x, 7x, 8x or 9y) specify the mobile phone operator. Some mobile phone operators have been given more than one operator code. In Circular No. 22/2014/TT ...
The Reynolds number is the ratio of inertial forces to viscous forces within a fluid that is subjected to relative internal movement due to different fluid velocities. A region where these forces change behavior is known as a boundary layer, such as the bounding surface in the interior of a pipe.
Mobile phone numbers have a total of 10 to 12 digits for postpaid depending on the operator, whereas prepaid services get 11 to 13 digits determined by the operator. Until October 1999, East Timor was included in the Indonesian telephone numbering plan, using the area codes 0390 (for Dili ) [1] and 0399 (for Baucau ).
Country code. +971. International access. 00. Long-distance. 0. Telephone numbers in the United Arab Emirates (UAE) follow a closed telephone numbering plan. The UAE is assigned an international dialing code of +971 by ITU. Telephone numbers are fixed at seven digits, with area codes fixed at two or three digits.
00 800 – Freephone / toll free (from all Irish mobile and landlines. 8-digit numbers in the format 00 800 xxxx xxxx. Where high volume 'bursty traffic' is anticipated, such as on-air radio competition lines, the first two digits of the phone number are always 71. For example: 1800 71 x xxx or 0818 71 x xxx.
In fluid mechanics, the Rayleigh number ( Ra, after Lord Rayleigh [1]) for a fluid is a dimensionless number associated with buoyancy -driven flow, also known as free (or natural) convection. [2] [3] [4] It characterises the fluid's flow regime: [5] a value in a certain lower range denotes laminar flow; a value in a higher range, turbulent flow.
Geographical telephone numbers. Since the reorganization of the telephone system in 1995, Dutch geographical numbers consist of 9 digits. The numbering plan implements a system of area codes. An area code consists of two or three digits. The larger cities and areas have two digits with a subscriber number of seven digits, permitting more local ...
Telephone numbers in Hong Kong are mostly eight-digit. Fixed land line numbers start with 2 or 3, mobile (cellular) phone numbers with 5, 6, 7 or 9, pager numbers with 7 and forwarding service with 8 [citation needed]. Since the end of 1989, there have been no area codes within Hong Kong. The telephone number for emergency services – Police ...