Asia Pacific 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.

Asia-Pacific (APAC) is the part of the world near the western Pacific Ocean. The Asia-Pacific region varies in area depending on context, but it generally includes East Asia, Oceania, the Russian Far East, South Asia, and Southeast Asia. Countries in Asia Pacific are Niue, Nauru, Tuvalu, Cook Islands, Palau, Northern Mariana Islands, Marshall Islands, Tonga, Micronesia, Kiribati, Guam, Samoa, French Polynesia, New Caledonia, Vanuatu, Brunei, Maldives, Macau, Solomon Islands, Bhutan, Fiji, Timor Leste, Armenia, Mongolia, Georgia, New Zealand, Singapore, Turkmenistan, Kyrgyzstan, Laos, Hong Kong, Papua New Guinea, Tajikistan, Azerbaijan, Cambodia, Kazakhstan, Chile, Sri Lanka, North Korea, Australia, Nepal, Malaysia, Peru, Uzbekistan, Canada, Afghanistan, South Korea, Myanmar, Thailand, Turkey, Iran, Vietnam, Philippines, Japan, Mexico, Russia, Bangladesh, Pakistan, Indonesia, United States, India, China.