以下为句子列表：
英文: Abstract: This paper describes our testing process of several injection punch heads made of different materials,compares them in performance and economic benefit comprehensively,and at last selects a kind of more economic injection punch head to be used i
中文: 文摘:本文叙述了几种不同材质压射冲头的试验过程，并从性能及经济效益两方面进行了比较，最终选择出了一种较为经济实用的压射冲头并应用于生产。
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