back-up
后视
back observation【测】;backsight【测】
暂无补充释义。
相关词条
ladder-back
back teeth
book back gluing machine
back breaking
back-pedal brake with cams for cycles
run back over
back center (lathe center)
back observation【测】;backsight【测】
暂无补充释义。
back-up
ladder-back
back teeth
book back gluing machine
back breaking
back-pedal brake with cams for cycles
run back over
back center (lathe center)