精选优质文档-倾情为你奉上Abstract: Based on the comprehensive analysis on the plastic parts structure service requirement, mounding quality and mould menu factoring cost. A corresponding injection mould of internal side core pulling was designed. By adopting the multi-direction and multi-combination core-pulling. A corresponding injection mould of internal side core pulling was designed, the working process of the mould was introduced五年级第一学期期中考试题(数学)专心-专注-专业一. 填空(每小题2分,共18分)1. 1.2时=(