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Aim at current existent problems and defects in visual approach slope indicator, a new Precision Approach Path instruction method has studied. 針對(duì)現(xiàn)有目視進(jìn)近下滑坡度指示系統(tǒng)存在的問題和缺陷，研究了一種新型精密進(jìn)近航道指示方法。