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The large block rate of open pit mining is an important indicator to measure the effectiveness of the blasting. In 2011, the 3.8 million t/a open pit of Yuxi Dahongshan Mining Company experienced the problem of excessive blasting. For this reason, the A33~A34 line blasting of the 910-895m p…
Delicate tea, need more care in the production process, and for the growth of tea pests cause severe damage, so in order to increase organic tea management and eliminate any chemical fertilizers and sprayed with pesticides, many of the ecological tea is widely used to kill The &q…
[Chemical composition] The number of Fe 3+ in the crystal structure of the attapulgite can be greater than 1, which is called iron- rich att…
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Recently, Mazda (China) Enterprise Management Co., Ltd. filed a recall plan with the AQSIQ, and will recall some of the imports from April 14, 2005 to February 15, 200…
Introduction: The mortar spraying machine (also called mortar spraying pump) has advanced technology, reasonable structure, stable performance, convenient operation and maintenance, and long service life.
Introduction: fiber laser cutting machine is a …
The comprehensive utilization of biomass biogas power generation technology Chen Zezhi (Nanjing University of Science and Technology, Nanjing 210094) was described in terms of system characteristics, operating conditions, and problems that are prone to occur.
1 Characteristics of …