Judging target main attack direction is an important link in air defence artillery campaign command.

判断目标的主攻方向，是防空兵作战指挥中的重要环节。

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Gas Control Coal Mine Safety Research is the main direction of attack, the academia and industry on one of the hot spots.

瓦斯治理是煤矿安全研究的主攻方向，是学术界和工业界的研究热点之一。

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