The method is characterized in that the ore is divided into a mine room and a pillar, a first mining room and a rear mining column; in the mine room, the shallow eye is used to recover from the top to the bottom, and the ore collected each time is only released 1 /3 or so (referred to as local minin
In response to the call of Premier Li Keqiang, the government departments and public service departments should purchase more new energy vehicles from this year. The proportion of new energy vehicles in the “13th Five-Year Plan†central government organs will reach more than 50%! On th
Qing Qing Jiangsu Ankerui Electric Appliance Manufacturing Co., Ltd. Jiangyin , Jiangsu 214405 Abstract Ankerui residual current type Lu Xiaojun electrical fire monitoring system adopts ARCM residual current type electrical fire monitoring device. It adopts on-site local networking method. After
China Drying Network News learned from the Technical Center of Sai Ding Engineering Co., Ltd. that the company's carbon flow value is shared with Sichuan Dazhou Iron and Steel Group Co., Ltd., Sichuan Daxing Energy Co., Ltd. and Sichuan Tianyi Science and Technology Co., Ltd. Optimize the rese
Recently, the China Automobile Industry Association's Brake Committee and Shanghai Automotive Engineering Society jointly organized the "Automobile Collision Safety System Technology Application Seminar" in Zhengzhou National High-tech Development Zone. More than 80 experts from 13 a