The defenders' artillery was posted to the rear of the main line of trenches.

防守一方的炮位被布置在这些主堑壕后方。

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According to the relationships among main parts of artillery, degrees of freedom are discussed based on the analysis of the topology of field artillery.

根据地火炮的主要部件的连接关系，在分析了火炮拓扑结构的基础上，讨论了火炮各体的自由度。

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The main fault modes that affect firing performance of artillery are analyzed, and three principles of performance evaluation are brought forward.

分析了影响火炮射击性能的主要故障模式，提出了火炮正常工作的三个基本准则。

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Thompson enlisted in September 1939, trained with the Royal Artillery, and went to north Africa as part of Phantom, an irregular outfit, whose main work was front-line reconnaissance and communication.

ECONOMIST: Epitaph for a poet