刮准直边的英文

• scraped straight edge

• 刮:    shave
• 准直:    alignment; collimation
• 边:    side; section
• 直边:    flat side; flat spot; skirts length on heads; square edge; straight edge; straightedge
• 准直:    alignment; [物理学] collimation◇准直管 collimator; 准直技术 collimation technique; 准直透镜 collimation lens; 准直仪 collimator