词汇	principal distance error
释义	principal distance error 像主距误差
随便看	horizontal segments horizontal segregation horizontal seismic horizontal seismic action horizontal seismic coefficient horizontal seismic direction horizontal seismic force horizontal seismic inertial force horizontal seismic isolation horizontal seismograph horizontal semicircular canal horizontal sensitivity horizontal sensitivity vernier horizontal separation horizontal separation indicator horizontal separation of the data horizontal separator horizontal septum horizontal series lattice spacing horizontal-series lattice spacing horizontal setting horizontal sextant angles method horizontal shading horizontal shading device horizontal shading signal