1 relationship between technical management and safe production

Coal mine production safety to do, it must be integrated using a variety of production technology and management techniques. Because coal mine safety manag.......

Looking at the fierce competition in the consumer electronics sector, Siemens and Philips began a strategic transformation a few years ago. In 2014, Siemens released its vision for the 2020 company, which will focus on electrification, automation and digitization in the future. Philips continue.......

As one of the most influential international exhibitions in the lighting industry, the theme of this year's Frankfurt Lighting Fair explains the concept of modern lighting design and the individual needs of future lighting, and the intelligence is obvious. It is one of the innovations. As o.......

1 Introduction

Enriched fault in the coal-containing formation, fold; Coal Seam, fluctuation tendency, was syncline anticline; large mine coal seam thickness variation, called Coal Mine unstable.

Coal mines in F.......

A few days ago, Guangdong Province issued 11 local standards concerning LED lighting, which will further advance the standardization of the industry. I believe that in the past year, there will be a lot of people who spoke about the lack of industry standards for LED lighting and the lack of .......

Now, in the streets and all areas of real estate properties, you can see the car park management system that controls the entrance and exit of vehicles. With the increase of automobile vehicles and the acceleration of the pace of life, more and more organizations and institutions need to have.......

1 Ground grouting reinforcement wellbore mechanism

The vertical additional force hypothesis of shaft rupture suggests that the special aquifer is hydrophobic due to mining and other activities, causing the water level to drop, the effective stress of t.......

P2.5 LED display has two methods to control the brightness: one is to change the current flowing through the LED display, the general LED display tube allows a continuous working current of about 20 mA, except that the single red LED display has saturation The brightness of other LED displays.......