将精度检查靶放置在距炮口20米处，不得倾斜，零位线高度与火炮高度一致；
Put accuracy checking target 20m away from muzzle without titling, height of zero line and that of artillery accord with each other;
将精度检查靶放置在距炮口20米处，不得倾斜，零位线高度与火炮高度一致；
Put accuracy checking target 20m away from muzzle without titling, height of zero line and that of artillery accord with each other;
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