于是，能形成薄壁小直径的内筒，特别是可以延伸，从而提高了轴向的压曲强度。
The inner cylinder may therefore be formed thin and small in diameter and particularly the stretched inner cylinder is high in buckling strength.
于是，能形成薄壁小直径的内筒，特别是可以延伸，从而提高了轴向的压曲强度。
The inner cylinder may therefore be formed thin and small in diameter and particularly the stretched inner cylinder is high in buckling strength.
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