The section mining method is based on the division stage, and then the stage is divided into sections, each of which forms an independent mining and ventilation system. During the continuous mining, the temporary top and bottom columns are reserved between the s…
The treatment of harmful su…
With the development of optical fiber communication technology, optical fiber fusion welding technology is the most extensive and basic specialized technology in the field of optical fiber applications. It is one of the basic skills indispensable for security engineering technicians.
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According to information released by the Argentine Ministry of National Defense, the Argentine Army has received the first crane produced by Sany Heavy Industries, model STC-800, which was the first of four Aruba-ordered cranes ordered by the Argentine militar…
The application of centrifugal pumps is very extensive, as it is used in many industries, such as chemical plants, mines, pharmaceutica…
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PAR56 35W LED Pool Light Details: Power:35 W Voltage: 12V AC / DC Lumens: 2900 lm Beam Angle: 120º IP Protection: IP68 Life Span: 30,000 Hours Type: SMD 3014 Number of LEDs: 441 Size: Ø178 mm<… National green mine basic conditions In order to implement the scientific development concept, standardize the behavior of mining enterprises, strengthen industry self-discipline, fulfill corporate social responsibility, promote the development… |
