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问清楚这家旅行社这个团的详细情况：包括游览的景点、住宿、用餐、导游、旅游用车、购物次数，是否强迫购物等。您跟旅行社签合同之前，
