The room and pillar method is a common mining method for returning the stable level of the mining rock and the ore body below the moderately inclined medium thickness. It is characterized by dividing the mining room and the pillars in the mining unit and alternating them. When returning to the …
- Model NO.: 976 …
[ Instrument Network Instrument R & D ] On December 6, 2019, the Science and Technology Evaluation Center of the Ministry of Science and Technology organized a comprehensive acceptance meeting of the "National R & D of High-end Holographic Gratings" project …
[ Instrument Network Instrument R & D ] On December 4, 2019, the Ministry of Science and Technology organized experts to develop a major scientific instrument and equipment research project undertaken by the Beijing Institute of Metrology and Testing "proton transfer…
[ Instrument Network Instrument R & D ] Recently, approved by the Zhejiang Provincial Science and Technology Department, led by the Zhejiang Metrology Institute, a number of enterprises and research institutes participated in the key R & D plan of Zhejiang Province. A…
[ Instrument Network Instrument R & D ] According to expert estimates, the number of global IoT devices (including sensors that collect real-time data on infrastructure and the environment) may increase to 75 billion by 2025. However, these sensors require frequent batter…
Since July, the market demand for bitumen in Shandong has been strong, but the supply is obviously insufficient.
It is reported that Shandong's vigorous construction of highway projects this year, asphalt demand increased slightly compared to the same period last year. However, re…
It is reported that Shandong's vigorous construction of highway projects this year, asphalt demand increased slightly compared to the same period last year. However, re…
Recently, Li Yizhong, head of the State Administration of Work Safety Supervision, said in an exclusive interview with CCTV's "The Policymakers" that the revised "Coal Law" will increase accident compensation and economic penalties.
Li Yizhong said that many pr…
Li Yizhong said that many pr…
On May 31, 2005, Beaverton, Oregon, the world's leading manufacturer of test, measurement and monitoring instruments - Tektronix (NYSE: TEK) announced that it has released two new logic analyzers - the TLA7012 portable host and the TLA7016 desktop host. . Compatible with a…
Materials and devices are the foundation and precursor of modern high-tech. Nanomaterialization and miniaturization of devices have placed new demands on the evaluation methods of various new materials and devices - micro-domain physical properties and non-uniformity detection…
The reporter learned from Shenzhen Square Auto Park Co., Ltd. that Shenzhen’s only super permanent motor city is under construction and is attracting investors. Shenzhen Automobile Park is located in the Fore Bay Area in western Shenzhen, with a total planned area of ​ 
(1) Raw material-oriented industries: These industries mainly refer to industries where raw materials are not easily transport