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;
该产品的主要测试项目是本体配重及零位信号、零敏度、梯度及输出信号极性的检查等等。
This product is the main test project ontology counterweight and zero signal, zero sensitivity, gradient, and output signal of polarity of the check, etc.
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