近子午圈天顶距
circummeridian zenith distance
天顶距记簿
abstract of zenith distance
DOHC(双顶置凸轮轴)
all-position oxygen cutting machine
对顶双锥机构
opposing vertexes double pyramid mechanism
机载双天线InSAR
airborne dual-antenna InSAR
机载双天线微波辐射计
airborne double-antenna microwave radiometer
十二顶双镍十硼烷
Twelve-vertex Dinickeladodecaborane
twelve vertex dinickeladodecaboranes