MENA tunnels tenders

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A tunnel is an underground passageway, dug through the surrounding soil/earth/rock and enclosed except for entrance and exit, commonly at each end. A pipeline is not a tunnel, though some recent tunnels have used immersed tube construction techniques rather than traditional tunnel boring methods. A tunnel may be for foot or vehicular road traffic, for rail traffic, or for a canal. The central portions of a rapid transit network are usually in the tunnel. Some tunnels are used as sewers or aqueducts to supply water for consumption or for hydroelectric stations. Utility tunnels are used for routing steam, chilled water, electrical power or telecommunication cables, as well as connecting buildings for convenient passage of people and equipment.

The Middle East and North Africa. It is also known as WANA, which alternatively refers to the Middle East as Western Asia. As a regional identifier, MENA is often used in academia, military planning, disaster relief, media planning and business writing. Moreover, the region shares a number of cultural, economic, and environmental similarities across its comprising countries; for example, some of the most extreme impacts of climate change will be felt in MENA. Some terms have a wider definition than MENA, such as MENAP or Greater Middle East, which extends to South Asia to include the countries of Afghanistan and Pakistan. The term MENAT explicitly includes Turkey, which is usually excluded from some MENA definitions, even though Turkey is almost always considered part of the Middle East. Countries in mena are Algeria, Bahrain, Egypt, Israel, Jordan, Kuwait, Libya, Morocco, Oman, Qatar, Saudi Arabia, Tunisia, United Arab Emirates, Yemen.