运行于非受管环境下的应用程序必须显式提交或回滚事务。
An application running in a non-managed environment must explicitly commit or rollback transactions.
花键管冷滚轧精密成形过程不同于花键轴类零件，其坯料金属变形量大，成形过程较为复杂。
The spline tube differs greatly from the spline shaft parts in the cold roll forming process, which has a complex process with large blank deforming quantity.
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