Theory and technology of pressure swing adsorption for coal bed gas separation 并列题名：Theory and technology of pressure swing adsorption for coal bed gas separation Ory and technology of prectpitation and adsorption for heavy metal wastewater treatment Theory and technology of particle damping for vibration reduction Theory and technology of precision plastic forming of gears Theory and technology for supercritical carbon dioxide coal-fired power generation Theory and technology of persulphate advanced oxidation Theory and technology of surface gathering and transportation in coalbed methane field Theory and technology of cloud computing for digital communication Theory and technology of removing the orthopaedics metal internal fixation