Recently, JDPower Asia Pacific released the 2014 China After-Sales Service Satisfaction Study (CSI). The data shows that the overall after-sales service satisfaction level of Chinese auto dealers has steadily increased in 2014, and the gap in satisfaction between mainstream and luxur…
S1m0 is the involute of the base circle O1, and S1m1 is the involute of the base circle Oc1. According to the involute property, the centers of curvature of m0 and m1 are respectively at the n0 and n1 points on the pitch line PL. It is easy to prove that the angle between the tangent line …
Since 2011, under the condition of high fuel prices and the low prices of ordinary road freight, the profitability of truck users has dropped. It is expected that the newly introduced logistics countries will be able to solve the problem of arbitrary charges, unlawful fines, and irregular…
Regulating valve is particularly important in industrial production and very common control equipment, it is working properly or not directly related to the normal production of the entire device or not. At present, with the rapid development of control valve technology, the manufacturer and fo…
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Time to enter the second quarter, LED industry company's first quarter results forecast has been disclosed nearly half. According to statistics of the same flush, nine of the 20 listed companies in the Shenwan LED industry have released their first-quarter results. Among the 9 companie…
With the development of moder…
At present, China's internal common standard fasteners have been oversupply, while high-end fasteners (high temperatur…
On the morning of July 5th, at the Beijing Metro Line 4 Zoo Station, the elevator was reversed due to sudden equipment failure. Some passengers who were taking the elevator fell down, killing 1 person and injuring 30 others. The Beijing Municipal Bureau of Qua…