life change units
【机械工程，照明，加热，武器，爆破】可变齿轮（可变齿轮）【机械工程】换档
change gear (shift gear)
暂无补充释义。
相关词条
change-over time
abrupt textural change
change personnel upon completion of a term of office
temperature change
design change work order
change-over
change-over projection