A stage is arranged between the conical barrel and the column barrel, the motive power action of the machine separating is enhanced, and the length of a rolling barrel is reduced.

在锥筒与圆柱筒之间设置了台阶，加强了机器分选的动力作用，并可减小滚筒的长度。

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By means of numerical calculation, the rules of J-Integral values varied with the length and depth of the inner surface crack of gun barrel were obtained.

通过数值计算，得出了身管内表面裂纹J积分值随裂纹长度及深度的变化规律。

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This oak had been aged nine to 12 months, up to three months longer than the normal length of time for standard barrel wood.

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The gathered information would be used to tailor the stock and barrel of his shotgun to his arm length and shooting tendencies.

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