According to data from the China Automobile Association, in June, the production and sales of heavy trucks were 95,200 vehicles and 97,600 vehicles, a decrease of 1.05% and 0.13% month-on-month, a year-on-year increase of 66.83% and 64.39%; of which, 442,000 vehicles and 47,900 vehicles were semi-

1, after a period of use and pressure, the pressure gauge movement will inevitably appear some deformation and wear, the pressure gauge will produce a variety of errors and failures. In order to ensure its original accuracy without distorting the value, it should be replaced in time

With the development of modern lightning protection technology, DC high-voltage generators in the small current grounding system are gradually applied to the electrical equipment such as transformer switches, busbars, motors, generators, lines, and capacitor banks in the AC series gap zinc oxide s

The Heshan Iron Deposit is a high-temperature gas-liquid metasomatism (stratigraphic) deposit, which mainly occurs in the contact zone between the diorite and the Zhouchong Village Formation and the Zhouchong Village limestone near the contact zone. The ore body strikes 320, the strike length is 55

From July 6th, Volvo Car China will adjust the recommended retail price of the basic maintenance service package, with an average decrease of 10%, and some models will fall by 23%. At the same time, the recommended retail price of common accessories fell by an average of 10-17%, and some parts fell

The deep deposits are under high stress conditions. As the mining progresses, the stress field will be redistributed and stress concentration will occur, causing deformation and damage to the roof and surrounding rock masses, which will lead to large-scale engineering disasters, causing casualties

According to reports, people familiar with the matter said that several German companies negotiating with potential buyers in China are pushing forward negotiations and are not affected by the new German acquisition regulations. After a series of transactions in China to acquire Western technology

Industrial process mainly copper oxide ore flotation, the flotation process are: sulfide flotation, flotation method, the pretreatment - Xuanye combined flotation and the like. Different types of copper oxide ore have different buoyancy, and malachite, azurite, and azurite are better in buoyancy, wh

The top management method is to retain the pillars, and the second is to use bolts. The stability of the surrounding rock itself is an important aspect. 1) Retaining column support When the poor stability of roof rock, the pole can be mounted in the roof rock in order to increase its stability. W

The main mining project of deep mining in Tongshankou Copper Mine, including the neck section, the normal section of the wellbore, the bad rock section and the Matoumen of the -160m, -280m, -400m, -440m middle section, the -480m belt horsehead, the bucket measurement Drainage room, -540m powder min

According to the data, demand for lighting fixtures in the United States is expected to reach $32.5 billion in 2018, and demand for portable lighting fixtures is expected to reach $4.8 billion in 2018. The economic recovery and the rebound in residential construction activity are expected to drive d

Jiaojia gold mine located in Laizhou City, Shandong Province, was founded in 1975, mainly on long-term use layered approach to fill stoping method [1], the method of construction along the plate approach is the main method of mechanized mining stoping layout approach In the way, along the ore body,