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Self-cleaning filter is a kind of using mesh directly to intercept the impurities in the water, purify water, suspended solids, particulate matter, reduce the turbidity, purify water quality, reduce system dirt, bacteria and algae, corrosion, etc, to purify the water quality and protect the system precision equipment of other equipment to work normally.
Reverse flushing can be done automatically: the backwash is done by hydraulic valve opening and hydraulic cylinder pistons, which are controlled by the backwash controller. The anti-flushing controller can accurately control the hydraulic valve and hydraulic cylinder according to the differential pressure value from the filter inlet and outlet, and the power of the controller comes from the pressure of the line itself.
Early pneumatic tyre, use is made of coated with rubber canvas when tire body, because the canvas ordinate and horizontal lines cross each other, due to the deformation of the tire when walking, lead to rub against each other, in this way, the line is easy to be ground breaking, the tires can only run 200-300 km. In 1903, Mr. J. f. palmer invented the twill textile, which led to the development of cross - layer tires, making the tyre life a big step forward. Because the tire of the skew fork will no longer cause friction because of the tread of the tyre, the cord will not be easily worn out, so the life span will be considerably longer. In 1930, Michelin made the first tyre without a tyre. The world famous meridian tire was invented in 1946. Therefore, the development of the tire has been a long journey, in this long night, I do not know how many generations have paid hard labor and excellent wisdom
The tire is one of the most important components of the car, its main function is: support the vehicle all the weight, bear the load of the car; To transmit traction and brake torque to ensure the adhesion of wheels and pavement; Reduce and absorb the vibration and impact of the car while driving, prevent violent vibration and early damage of the auto parts, to adapt to the high speed of the vehicle performance and reduce the noise of cars, to ensure driving safety and handling stability, comfort, energy conservation and economical efficiency
14. In order to ensure the train operation safety and order, as far as possible not to stop delivery scheduling command, scheduling command wireless transmission system, the system should be used to value multiplied driver release scheduling command, is involved in running conductor, by the driver to operate the commander to convey; When the content and conditions of dispatching and dispatching orders are issued and conveyed by using the wireless dispatching communication equipment, the dispatch and dispatch order of the wireless dispatching communication equipment shall be applied. In the absence of the above conditions, there is a suspension station in this section, and the train dispatcher delivers the dispatch order at the stop station before entering the relationship interval; There is no stop in this section. The bureau may entrust the station with the station to forward the dispatching order to the operator and the operator. The entrusted office shall indicate to the entrusted authority the contents and specific vehicles of the dispatch and dispatching order, and the entrusted office shall not refuse the commission when the time permits. If the train is not in time, it must stop at the station before the train enters the relationship. The entrusted telephone shall have a good communication recording device.
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