The source and damage of manganiferous wastewater were introduced. The control technology, sewage purification means and water resources protection were discussed.
Obtained gas emission regularity of working face by detection on gas emission,offered reference parameters to the similar condition working face for gasproof.
The judicial minister cited the latest crime figures as proof of the need for strengthening of the comprehensive administration of social public order.
For turning from such unbenefited situation, it is necessary to reexamine the governance structure of our current solely state-owned company and make a further exploration.
After analysis and determination on harmonic wave from rectification units operation, and understood hazardness of harmonic wave, the design project of harness was put forward.
Bio - degradation role of aerobiotic organic substance and relationships between biological degradation and dissolved oxygen were stated, which provided theoretical basis for waste water reatment.
Baumol, William J., Panzar, John C., and Willig, Robert D. Contestable Markets and the Theory of Industry Structure, Revised Edition, San Diego: Harcourt Brace Jovanovich, 1988.
Fascine dike is one of the methods for the control of collapsing pits along river bank,which is actually a pervious dike piled up by the fascine bundles.
The application of surfactant in microbial degradation of petroleum pollution in recent years is introduced in this paper and the factors of choosing the eptitude surfactant are also disc.