The most important thing in the use of pressure gauges is the accuracy of the gauge indication. The pressure gauge indicates whether it is accurate and whether there are errors. In addition to some factors of the pressure gauge itself, external factors will also affect the indication resul.....

The double roller crusher is mainly used for the crushing of medium or lower-hardness mines and rocks with medium or lower rigidity in the trade of cement, metallurgy, chemical industry, electric power, coal and other industrial. The crushing materials include limestone, slag, coke and coal.  .....

The construction of the evaluation index system is an important part of the soil testing and fertilizer application system, and is the main method for screening and verifying soil nutrient testing methods. In order to reduce the impact of soil nutrient test system errors on the test res.....

1 Overview 1.1 The Necessity of the System With the development and popularization of computer technology, the number of computer systems is increasing day by day, and the supporting environmental equipment is also increasing. The computer room has become an important part of major units. The env.....

The "12th Five-Year Development Plan for Instruments and Metering Industry" clearly requires that by 2015, the total output value of the instrumentation industry will reach or approach RMB 1 trillion, and the average annual growth rate will be about 15%; the export value will exc.....

First, the refueling tanker must be used in a dry environment, and it is strictly prohibited to work in the open air. The installation position of the tanker shall comply with the relevant provisions of the local gas station construction and fire protection .....

Correct use of brakes The brake system is often supplemented with lubricating oil, which is well known to the majority of vehicle owners. On the other hand, for the brake fluid, many vehicle owners often buy new vehicles until the vehicles are damaged and .....