Our society is now entering a period of highly intensive construction. There have been new record-breaking high buildings that have b.......

It is a kind of bottom column caving method and has the common feature of the bottom column caving method. The stage caving method is to recover at the full height of.......

Mining block mining work:

Basically similar to the subdivision method.

(1) Stage transportation lane layout – the original ore body is transported by pulse; the extremely thick ore body is mined and transported by pulse inside and outside.

(2) Bottom struc.......

When it comes to "safety redundancy", many truck drivers will be as worried as journalists. In fact, at the technical level, the so-called "redundancy" refers to the adoption of two or more sets of relatively independent configurations to increase reliability. â�.......

On October 19th, the Global Construction Machinery Industry Conference and Top 50 Summit was held in Beijing. Su Bo, Vice Minister of Industry and Information Technology, pointed out at the meeting that by 2020, the proportion of high-end equipment manufacturing industry sales revenue in t.......

Radio frequency admittance level switch is widely used in petroleum, chemical, metallurgy, electric power, medicine, food, paper, building materials and other industrial fields. The product uses high-frequency technology to generate a low-power RF signal from the electronic circuit to the p.......