Rotary vane vacuum pump noise, usually refers to the pump when the temperature is stable, measured under the ultimate vacuum noise level. It includes the noise of the pump itself and the noise of the motor to the user. It is also concerned with the noise at the start-up phase when the p…
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At the capital level, Weichai succeeded in the acquisition of the Torch of Hunan; at the industry level, Cummins grabbed a joint venture with Shaanxi Heavy Gas. But this is still just a beginning. Although Shaanxi Heavy Gas, one of the four gold assets under the …
China has made solemn promises to the world at the Copenhagen conference: First, by 2020, non-fossil energy accounts for about 15% of primary energy consumption. Second, by 2020, the intensity of CO2 emission per unit of GDP will fall by 40%-45% compared with 2005.
Whether or not s…
On July 28, the development of China's high-speed railway and the press conference of the Seventh World High-speed Railway C…