用常规的幂强化公式计算药筒在引伸后的强度时，数值偏低较多，原因是该公式未考虑引伸凹模锥角对强化的影响。
But the strength of the cartridge case after ironing drawing cannot be accurately calculated by this formula, because the result of calculation is lower than that reached in practice.
所有病例根据手术切除范围、术后照射范围大小以及后颅凹照射剂量的不同，分三组进行1、3、5年生存率及预后因素的分析。
The cases were divided into three groups according to resection scope, radiation range and radiation dose of Posterior Fossa. Each group was analysed with 1, 3, 5 year survival rates and prognostic.
然而用标准渐开线齿形剃齿刀剃齿后，在工件齿形节点附近会出现不同程度的“中凹”现象。
However, after shaved by shaving cutter with true involute profiles, there are the "mid-concave" phenomena on the pitch points of shaved gear tooth profiles inevitably.
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