The critical pressure ratio rcr refers to the ratio of the inlet pressure to the inlet velocity at the local velocity of sound at the minimum flow path cross section. The critical pressure ratio of the nozzle can theoretically be completely determined by the formula. When the nozzle outlet pres…

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The newly established Asian headquarters and R&D center of German Continental Group, a parts supplier in Shanghai's Yangpu District, was officially completed and put into operation. The new Asia headquarters and R&D center is another important milestone for the Continenta…

“The Ministry of Environmental Protection has begun to accept the environmental protection catalog for EGR engines !” Recently, a heavy truck company responsible for product announcements and environmental catalog applications told commercial motor journali…

A few days ago, the China Coal Geological Administration discovered a type II large-scale salt deposit in the Huai'an salt mining area in Huai'an City, Jiangsu Province.

The exploration area of ​​the Shiyan deposit in the Zhangxing section of the Huai'an salt…

Recently, the National Federation executive vice president of commercial vehicle parts sales Yan Lixing, Secretary-General of the National Federation of commercial vehicle parts sales Mts, known industry experts Hu Xiong and his party come to Dongguan, So…

The "one-time-net," "big meritorious," "cleansing," "rehabilitating, and so on." These various names actually represent the same pesticide, imidacloprid. From July 1, they will be uniformly labeled as imidacloprid. Earlier this year, the Ministry of Agric…