extensionn.延长;伸展;延期;扩充;观念发展;增强n.电话分机;特别课程n.[计]文件名
extension beam trammel dividers长梁分规
extension of coefficient fields系数域的扩张
extension type working platform可伸缩工作平台
extensions Hoelder's inequality
extensional ductile shear zones多层次韧性剪切滑脱带
extension shaft for rolling mil轧机接轴
extension or contraction factor伸缩因子
extension of teaching functions教学功能的拓展