景观保护区划
landscape protection regionalization
井口保护架
protection frame for wellhead
井冈山自然保护区
jinggangshan national nature reserve
jinggangshan mountain national nature reserve
经期保健行为
menstrual health care behavior
经济环保型基质
environmentally and economically sound substrate
经济环保形势
economic and environmental protection situations
经济保温厚度
economic insulation thickness
economic insulating layer thickness
经济保温层厚度
economical insulation thickness