Construction machinery

Xem 1-11 trên 11 kết quả Construction machinery
  • Machinery Component Maintenance and Repair centralized organization of specialists within the operations department is charged with this responsibility for the network of facilities. Major engineering design and construction work related to new plants and plant expansions is handled by a separate corporate engineering department and will not be discussed in this section. The corporate engineering department is also available for special help to the operations department.

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  • Abstract In 1963 Atiyah and Singer proved the famous Atiyah-Singer Index Theorem, which states, among other things, that the space of elliptic pseudodifferential operators is such that the collection of operators with any given index forms a connected subset. Contained in this statement is the somewhat more specialized claim that the index of an elliptic operator must be invariant under sufficiently small perturbations.

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  • The collective load is the basis for determining the average speeds (2,387 min–1) and the average driving speed (111 km/h). For each of the load cases the tooth load acting on the pinion and the reaction loads from the bearings have to be calculated both for forward and backward motion (percentage times 50 % each). In addition to these forces, the bearings are subjected to loads due to the rotor weight, the unbalanced magnetic pull, unbalanced loads and rail shocks. Of these loads only the rotor weight, GL, is known; therefore, it is multiplied by a supplementary factor fz = 1.

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  • Seats for gate valves are either provided integral with the valve body or in a seat ring type of construction. Seat ring construction provides seats which are either threaded into position or are pressed into position and seal welded to the valve body. The latter form of construction is recommended for higher temperature service. Integral seats provide a seat of the same material of construction as the valve body while the pressed-in or threaded-in seats permit variation. Rings with hard facings may be supplied for the application where they are required.

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  • QUY CHUẨN KỸ THUẬT QUỐC GIA QCVN 13:2011/BGTVT VỀ CHẤT LƯỢNG AN TOÀN KỸ THUẬT VÀ BẢO VỆ MÔI TRƯỜNG ĐỐI VỚI XE MÁY CHUYÊN DÙNG National technical regulation on quality, safety and environmental protection for construction machinery Lời nói đầu QCVN 13 : 2011/BGTVT do Cục Đăng kiểm Việt Nam biên soạn, Vụ Khoa học - Công nghệ trình duyệt, Bộ trưởng Bộ Giao thông Vận tải ban hành theo Thông tư số 56/2011/TT-BGTVT ngày 17 tháng 11 năm 2011.

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  • Sound emission (AE) is one of the most important test non-destructive (NDT) methods of materials, construction and machinery. The sound emission method with most other technical non-destructive testing in two important respects. first of all, the signal source is always located inside the investigated materials / structures. The second important thing is the NDT method to detect geometrical discontinuities, while emission sound motion detection errors.

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  • The word technology refers to the making, modification, usage, and knowledge of tools, machines, techniques, crafts, systems, and methods of organization, in order to solve a problem, improve a preexisting solution to a problem, achieve a goal, handle an applied input/output relation or perform a specific function. It can also refer to the collection of such tools, including machinery, modifications, arrangements and procedures. Technologies significantly affect human as well as other animal species' ability to control and adapt to their natural environments.

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  • In the current five-year plan (1991-1995), China plans to place greatest efforts on developing infrastructure, particularly thermoelectric and hydropower installations, new railway systems, large deep-sea ports, a national phone network, and food processing and chemical plants. Local governments also have their own blue prints for local construction besides the central government integrative plan. For example, Guangxi province has 24 new and rebuilt major projects in 1992.

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  • All plans of central and local governments focus on the infrastructural construction, such as energy, transportation and communication, and food processing plants. These developments require new technology, new equipment, new machinery, and new materials, but at present these needs cannot be met internally, either in terms of quantity or quality; they must be met by imports.

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  • The word technology refers to the making, modification, usage, and knowledge of tools, machines, techniques, crafts, systems, and methods of organization, in order to solve a problem, improve a preexisting solution to a problem, achieve a goal, handle an applied input/output relation or perform a specific function. It can also refer to the collection of such tools, including machinery, modifications, arrangements and procedures. Technologies significantly affect human as well as other animal species' ability to control and adapt to their natural environments.

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  • The word technology refers to the making, modification, usage, and knowledge of tools, machines, techniques, crafts, systems, and methods of organization, in order to solve a problem, improve a preexisting solution to a problem, achieve a goal, handle an applied input/output relation or perform a specific function. It can also refer to the collection of such tools, including machinery, modifications, arrangements and procedures. Technologies significantly affect human as well as other animal species' ability to control and adapt to their natural environments.

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