sighting condition
... sighting board 觇板 sighting condition 通视条件 sighting error 照准误差 ...
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通视条件图 intervisibility
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加强夜间目标识别和非通视条件下地面活动目标侦察、作战指挥和打击能力；
It is also vital that capabilities of night target identification, mobile land target survilliance, combat command and control and precision of attack should be strengthened.
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