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Early replacement of EEE has often been argued in conjunction with the continuous improvement of energy efficiency in the use phase. Recent LCA studies show that the raw materials and manufacturing phase of many EEE have a proportionally increasing environmental impact. For mobile electronic products, an early replacement due to improved energy efficiency in the use phase is to some extent not reasonable...
A new kind of hydraulic motor with offset swinging planetary drive of bevel gears and the application in Capstan is presented; the researched of the calculation of the efficiency of the mechanism is made. Compared to the former structure, new kind of structure has many advantages over that of the old structure. The hydraulic driving system in the traditional derrick car is: hydraulic motor drives...
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