轨道螺栓 TRACK BOLTS ; Trair conditioningk Bolts

轨道陀螺罗盘 [航] orbit gyrocompass

轨道螺栓及螺母 Track Bolt and Nuts

螺线轨道 spiral orbit ; spiral trajectory ; spiral l orbit

螺旋轨道 spiral orbit ; orbit spiraling ; helical orbit ; helical trajectory

螺旋轨道光谱仪 spiral-orbit spectrometer

道轨用螺栓和螺母 Track Bolts and Nuts

螺旋轨道贝他射线谱仪 spectrometer ; helical orbit beta-ray

轨道用螺栓及螺帽 Steel track bolts and nuts