单词	内地居民
释义	内地居民 upcountry residents
随便看	mechanical oil mechanical oil production mechanical oil recovery mechanical oil recovery equipment mechanical oil valve mechanical operated arm mechanical operating mechanism mechanical operating valve mechanical, optical mechanical optical comparator mechanical-optical comparator mechanical optical sound recording mechanical-optical sound recording mechanical optical switch mechanical-optic deflector mechanical optics mechanical optimal design mechanical optimization design mechanical optimum design mechanical or acoustic measurement of frequency mechanical or acoustic vibration mechanical organ Mechanical organization mechanical orienting tool mechanical origin