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The world intellectual property organization in 1977 edition of the licensing handbook "for developing countries to use, to the definition of technology:" technology is knowledge for the manufacture of a product system, the adoption of a process or provide a service, regardless of whether this knowledge is reflected in an invention, a shape design, a utility model, or a kind of new plant varieties, or reflected in technical information or skills, or reflected in the expert for the design, installation, run a factory or maintenance or for managing a business or its activities and provide services or assistance, etc." This is by far the most comprehensive and complete definition of technology in the world. In fact, the intellectual property organization defines all the scientific knowledge that can bring economic benefits to the world as technology
The concrete (usually with steel bar) is poured directly into the stable and solid roadbed, and the new line of ordinary sleeper and gravel bed is not used. This kind of line is clean, suitable for large volume and difficult maintenance area, especially for tunnel, underground railway, port wharf and stone road base. But its construction investment is big, if because of the construction slapdash or basement instability, concrete layer fracture, cure difficulty. China's overall Taoist route in the tunnel is more than 300 kilometers long
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