The past century has witnessed an unprecedented increase in garbage output, most of it technological products that are difficult to be decomposed through natural processes, such as plastics and glass.
过去的一个世纪见证了人类前所未有的垃圾生产，而大部分是于各种技术产品的垃圾，它们很难通过自然过程进行分解，比如塑料和玻璃。
The problems and the treatments related to the mold manufacturing, technological conditions and plastics materials, which are often encountered in mold forming, are collected and arranged.
对模具在工作中常遇到的与模具制造、工艺条件及塑料材料有关的问题及相应对策进行了归纳整理，组成了模具诊断与维修知识库。
The properties, formation theory and technologies of microcellular foam plastics are introduced, and the technological difficulties in the formation of microcellular foam plastics are analysed.
详细介绍了微孔泡沫塑料的性能、成型原理和成型技术，具体分析了微孔泡沫塑料成型的技术难点。
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