- 定向: directional; orient; orienta ...
- 提纯: purification; purify; refine ...
- 提纯: purification; purify; refine; refinement◇提纯复壮 purification and rejuvenation; 提纯剂 purificant; 提纯器 purifier; 提纯塔 purifying column [tower]; 提纯油 good oil
- 方向提前角: lateral deflection angle
- 方向提前量: lateral lead
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