Hard Spot. An area in the pipe with a hardness level considerably higher than that of the surrounding metal, usually due to localized quenching.

硬块。通常由于局部淬火引起钢管上某一部位硬度值远高于周围金属的硬度值。

Results showed that the hardness level of drying schedules had much influence on both the drying strain developed and the time when it reached its maximum value.

结果表明，基准硬度水平对应变值的大小和最大应变值的到达时间有显著影响。

To study improving the factor's Level of Kushen Pian core tablets's hardness by mathematically statistical method . This method help us select the best productive process.

本文采用数理统计学的方法，研究了提高苦参片基片硬度的各种因素，找到了最佳工艺路线。