1, forecast spontaneous combustion of coal layer (1) Since coal produces CO in the low-temperature oxidation stage, CO is a sensitive indicator for early exposure of fire. The CO sensor is installed in the coal mine working face returning air passage, the comprehensive coal mining road and other pl

From the scope of a falling roof and the number of casualties, common roof accidents can be divided into the following two categories. 1. Local roof accident The characteristics of local roof accidents are as follows: First, the scope is small, and the number of casualties is small (1-2 people). T

In May, under the anticipated tariff reduction, high-end car consumers generally had a wait-and-see mood... Affected by this, the domestic premium car market, especially the second-line premium car brands with a larger proportion of imported cars, saw sales decline. On the day of the Dragon Boat

Nowadays, the valve market is a mixed bag. The unscrupulous traders have to take profits and counterfeit refurbished valves and shoddy, which poses a great safety risk to the installation project. Therefore, it is very necessary to introduce the inspection of the identification of refurbished valve

Driving on a rainy day not only affects sight but also brings troubles such as braking and flooding. For this, this article specifically recommended several rainy season driving car supplies, hoping to help owners. Suitable wiper Wiper identification method: use two fingers holding the r

Yueyang Dongfang Automatic Control Engineering Equipment Co., Ltd. is the only professional company engaged in the design, manufacture and sale of self-control valves in Central South China. It is located in Yueyang Economic and Technological Development Zone and is an internal ent

Intelligent large-screen appearance of the hardware field, the smart TV activation rate reached 31.1 million units, smart projectors are also emerging, but the traditional way of interaction does not seem to meet the needs of users, and new interactive methods are also emerging, Such as multi-touc

Since the beginning of this year, when market share has been declining, and most self-owned branded car companies have experienced difficulties, the responsible person of the relevant state department has recently indicated to the outside world that next year or through policy adjustments,

Garbage truck manufacturers introduce the rust and anti-corrosion treatment methods of common garbage trucks Garbage truck, garbage truck manufacturer, garbage truck box, anti-rust and anti-corrosion treatment As a special type of car used to collect and

Simple and easy to remember ball mill specification operation诀窍 Ball mills are a very common grinding equipment only in mineral processing applications. The principle of the small ball mill is not so complicated. The general principle of grinding is to use the friction between the materi

In the electrolytic production of nickel, iron-containing anolyte is generally 100 ~ 500mg / L, the solution was purified in claim reduced iron content 0.5 ~ 4mg / L, usually iron hydrolysis precipitation. (A) hydrolysis hydrometallurgical common iron precipitation method Hydrolytic precipitation

The hydraulic support shifting and coal discharging are the two main dust-producing dust sources in the fully mechanized caving face, accounting for about 30% of the output of the fully mechanized caving dust. It is also one of the key points of dust prevention in the fully mechanized caving face.