二面角角反射体
Dihedral corner reflector
车轴压入部倒角
Chamfer of wheelset pressing part
齿轮齿倒角机
gear tooth chamfering machine
tooth chamfering machine
齿轮倒角机
gear chamfering machine
gear tooth chamfering machine
磁极倒转
geomagnetic polarity reversal
倒极
rearrangeable electrode
exchange the electrode polarity