以下为句子列表：
英文: Based on pressing practical experience of EHA4120 double-faced clad plate elliptical head, the type head external surface clad layer crack reason during pressing process were analyzed and discussed, and the head pressing task was fulfilled successfully th
中文: 摘要根据EHA4120双面复合板椭圆封头的冲压实际经验，分析探讨了此种封头在压制过程中外表面复合层产生裂纹的原因，通过改进压制工艺，成功地完成了封头的压制任务。
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英文: Big basic nitrogen compounds (BNC) molecules poisoned the active sites on external surface of the catalyst, while small BNC molecules entered pore channels of the catalyst, both caused deactivation of the active sites.
中文: 大分子碱性氮化物可以毒化催化剂外表面活性中心，小分子碱性氮化物可以进入催化剂孔道，造成催化剂活性中心全部失活。
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英文: Carry out product audit Finish cars (PAF)or(CPA) audits according to standard.Including measuring， internal external surface check， static function test or function test.
中文: 根据检验标准进行PAF或CPA整车产品审核，包括测量，内外外观质量检查，静态和动态功能检查.
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