单词	maintenance improvement
释义	maintenance improvement 检修改进
随便看	low grade asbestos low-grade asbestos low grade astrocytoma Low grade bauxite low grade bituminous coal low-grade boilings low grade carcinoma low grade cement low-grade cement low grade cement pile low grade chalcopyrite Low-grade chalcopyrite ore Low grade chronic hyperbilirubinemia syndrome low-grade chronic hyperbilirubinemia syndrome low grade coal low-grade coal low grade coal fly ash low-grade coal thermal power plant Low Grade Coal Utilization on Precalcining Kiln low grade cobalt ore low-grade cognitive handicap low-grade combustion low grade concrete low-grade concrete Low-grade contamination