- t reference point
- t: 中世纪罗马数字的160。
- 参考: consult; refer to; read sth. ...
- 点: drop
- 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
- u参考点: u reference point
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