Private auto parts need to be eye-catching

Some time ago, Mr. Ma’s car needed to replace the wiper arm and wiper. Mr. Ma opened the car to the 4S shop for the first time, resulting in Mr. Ma’s difficulty in accepting the price. Wiper arm and wiper set down to more than 600 yuan. Mr. Ma de

Static balance valve for the occasion

Static balance valve is a commonly used old hydraulic balance products, it is suitable for heat-based variable flow system. Adjusting the flow of the mutual coupling between users, the real heat of the huge users to adjust the balance is difficult to achieve. Static balance valve operation is c

Development of efficient chiral catalysts

The Lanzhou Institute of Chemical Physics, Chinese Academy of Sciences, recently made a breakthrough in the preparation of catalysts for the asymmetric hydrogenation of aryl ketones. For the first time, researchers have combined non-chiral phosphines with rigid chiral cyclic diamines designed a