0 Preface
The goaf is generally the space left after the mining of the deposit by the mining method such as the room-pillar method, the comprehensive method and the retention method. If it is not treated or handled improperly, it will cause significan…
According to a Reuters quoted two people familiar with the matter on Wednesday, German luxury car manufacturer BMW is seeking to set up a joint venture with Great Wall Motor in China to focus on the production of electric vehicle…
1 Resource reserves and production
There are 8 iron mines in Shandong Province, including one central enterprise. In 2003, the total amount of mining (peeling) was 10.09 million tons, the output of raw ore was 6.204 milli…
Iveco cars equipped with vacuum booster, which allows the car even at low speeds, light brake pedal, it will have a higher braking effect, which will lead to the front brake system is too sensitive, easy to lock Slip, reduce driving stability.
To avoid these drawbacks, a hysteresis …
On March 21, 2011, Vaahto, a Finnish pulp and paper machine, had received an order from the paper mill in Imatra, Stora Enn, Finland. According to news received by the Russian analysis agency Lesprom Network, the plant's chemical pulp drying equipment will be transformed to achieve hig…