经纬仪仪量距测量
transit-and-chain surveying
齿轮测量仪器
gear measuring instrument
gear measurement instruments
齿轮测量中心
coordinate gearing measure machine
gear measurement center
gear measuring machine
Gear measurements
gear measuring center
gear measurment center
齿轮轮齿接触印痕
gear tooth contact pattern
复合轮齿齿轮副
complex wheel teeth gear set
万能齿轮测量机
universal gear measuring machine