光参考点的英文

• oroptical reference point

• 光:    light; ray
• 参考:    consult; refer to; read sth. ...
• 点:    drop
• t参考点:    t reference point
• 参考点:    datum point; fiducial point; point of reference; point reference; reference center; reference object; referred point; sgrp; witness mark; witness point; witness reference point