The express-method of the limit drawing ratio evaluation is presented.

列出了确定极限拉伸系数的快速方法。

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The axial drawing ratio and hoop extension ratio should be properly matched.

轴向拉伸比和环向扩张比要合理匹配。

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The curves and data of limit drawing ratio, which can be applied in production, are given.

文中给出的锥形件一次拉深成形极限拉深比图线和数表，可供生产实用。

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The ratio of workers paying into the system to people drawing benefits, after falling from 16.5 to 1 in 1950 to 3.2 to 1 now, will at last stabilize at about the current level.

CNN: A Debt-Threatened Dream

At the same time the ratio of active workers paying into the system to retirees drawing from the system has reached 1.86 to 1.

FORBES: Old Age Pensions 10 Percent of GDP and Rising