Lanzhou micro tillage access control - Gansu Zhonglian teaches you how to choose a large-scale network micro tillage access control system. Because the access control system can identify the arrival status in a timely and accurate manner, it has now entered office buildings, large-scale companies, ......
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First, commonly used maintenance lifting equipment (1) Fixed tackle (ie manual hoist) The fixed block is a fixed-point lifting device. It needs to be fixed on the bracket or the beam when needed. It can only be used for upper and lower one-way movement; the maximum lifting capacity can reach 20t, ......
The peptization-extraction method is a kind of phase transfer method, and its chemical principle is as follows. Precipitation reaction TiO 2+ + OH - → TiO(OH) + TiO(OH) + +OH - →TiO(OH) 2 ↓ (white precipitate) Peptization reaction TiO(OH) 2 (precipitation) + H + → Ti ......
1. When the steel slag ball mill is running, there is a very frequent hitting sound and the sound is also very large. It should be that some of the lining bolts are not tightened. The solution is that you can judge the ball mill by the sound of the machine. Which part of the liner, then find the lo ......
The heap must be washed before it is sprayed. Its purpose is to wash away the impurities mixed in the pile-up process, especially to remove some harmful impurities, to create conditions for spray leaching. The gold heap leaching, required alkaline water (milk of lime or caustic soda to the washing ......
In the past few years, the Asia-Pacific region, with China as its main market, has grown into one of ZF’s most important markets. In fiscal year 2015, ZF (ZF) in sales in the Asia Pacific region reached 6.4 billion euros, accounting for total sales (29.2 billion euros) 1/5 or more. Ta ......
Dust cleaning is a very important part of current urban sanitation projects. Dust not only causes urban pollution, but people also spend long periods of time in dusty environments, causing serious damage to the body and reducing dust in the environment. Vac ......
The types of nickel deposits in China are shown in Table 1 below: Table 1 Types of nickel deposits in China Deposit type Surrounding rock type The main metal minerals and gangue minerals Example Magma melt-dissolved copper- nickel deposit The second olivine peridotite is the main, followed b ......
1. Overview of sand gold deposit mining      There are two broad approaches open pit mining and underground mining deposits in sand mining gold. Underground mining is used less in China and will not be introduced here.      Open pit mining of sand gold is divided i ......
Dual-screen guest machines are well received by consumers. Today, we introduce the operation and use of dual-screen guest machines. The first step is to enter visitor information personnel or vehicle visitors, use the “generation ID card, second-generation ID card, passport, or other documen ......