The principle of Kjeldahl method: Protein is a nitrogen-containing organic compound. The food is heated and digested with sulfuric acid and a catalyst to decompose the protein, and the decomposed ammonia is combined with sulfuric acid t…
ih series of graphite centrifugal pumps for the single-stage single-suction wall centrifugal pump. Is the use of iso2858 standards, combined with the special graphite performance and processing technology and carefully designed and manufactured products. The product has the advantage…
A run-flat tire, also known as a run-flat tire or a zero-pressure tire, refers to a tire that can still travel a certain distance at a safe speed in the event of a loss of pressure. The two main performance indicators are the driving speed and distance after the tire loses pressure. …
Since February 2009, the busy scene of Tianjin Port’s “reverse trend of the global economy…
As of July 23, Dongfeng Dana Axle Xiangfan Factory completed 10,179 front axle assemblies, 6813 rear axle assemblies, and 182 new bridge assemblies in July, setting a new monthly high output.
In the traditional off-season in July, the new products of the “Hinoâ€, …
Recently, BYD officially obtained the passenger car production catalog, and will use it to enter the production and sales of electric buses. According to BYD's relevant person in charge, the first batch of electric buses will be rolled out within the year.
BYD Bus s…
More than 100 years ago, to brake a running train, it was necessary to manually pull the handbrake of each car to the train. On the day of 1867, the American George Westinghouse, who had been stranded at the train station due to the collision of two trains, had the idea of ​â…
Abbe refractometer use method
1. Preparation and Correction Place the refractometer in a well-lit place and connect it to a constant temperature water bath so that the temperature of the refractometer prism is 20°C. Then, the lower prism (mirror 18) is opened, twisted …
The association said that the output value of Germany's machinery manufacturing industry will drop by 20…