Because of the complexity of problem,the preform sequence and preform are usually determined through trial and error method based on practical experience and intuition.

　
英 美
  • 由于問(wèn)題的復雜性，通常是在實(shí)際生產(chǎn)經(jīng)驗基礎上，通過(guò)反復試驗的方法進(jìn)行預成形工步和預成形設計。
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