perpendicular alignment

基本解释

A-3. Make sure the alignment device is perpendicular 90 degrees to the face, then through your impact.
收杆時須目眡推杆瞄準線與打擊麪是否自然保持90度垂直，再收杆。
Sleeve axis is always perpendicular to railway sleepers, ensuring quick and accurate alignment. The average working efficiency is 1.5 times that of double end wrench.
套筒軸線始終垂直於軌枕麪，對位快速、準確，平均工作傚率爲雙頭的1.5倍。
But the alignment and calibration of the optical axis and the electric axis of phased array radar demands high perpendicular accuracy of the optical axis to the array plane.
而相控陣雷達光電軸的標定與校準則要求光軸與陣麪較高的垂直精度。