Through the study of the injection mould for the plastic conduit, the problems on design of multi_cavity injection moulds for deep_cavity plastic parts were solved.
对中性笔笔帽塑件进行了分析，确定了模具结构，阐述了深腔强脱塑件模具的设计注意要点，对同类注射模具有较好的参考价值。
Based on the theory of elastic-plastic deformation, according to the finite element method, this paper presents a nonlinear analysis of the distribution of the soil pressure of the ditch conduit.
表明对大型沟埋式管道的上压力，采用弹塑性理论的非线性分析是比较符合实际的，其结果可供设计参考。
Methods: With some simple materials such as silica gel conduit, non-returnable infusion-tube, foamed plastic board bored etc. Some the NNB thoroughfares are formed respectively.
方法：选择简单易得的硅胶管、一次性输液管、泡沫塑料板等材料，分别连接成各(NNB)通路，使液体试样富集成固体。
Methods: With some simple materials such as silica gel conduit, non-returnable infusion-tube, foamed plastic board bored etc. Some the NNB thoroughfares are formed respectively.
方法：选择简单易得的硅胶管、一次性输液管、泡沫塑料板等材料，分别连接成各(NNB)通路，使液体试样富集成固体。
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