Synthesis and preparation application of a new ultra-efficient and multi-purpose herbicide pyrafen<br> <br> Key technology of energy saving and consumption reduction in oil and gas gathering and transportation system at high water cut stage<br> <br> Development and industrial application of key technologies in large-scale methanol synthesis system<br> <br> Research and application of atomization technology in gas drilling<br> <br> Development and application of technology for producing food-grade white oil by full hydrogen method of naphthenic base oil<br> <br> Pattern of Mesozoic prototype basin in Bohai Bay basin and its superimposed relationship with Cenozoic basin<br> <br> Harmless treatment technology of waste liquid residue from drilling engineering in acid gas field<br> <br> Clean production technology of diacetylacetyl-p-phenylenediamine bisazo organic pigment
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