In recent years aimed at foreign extrusion technology and the development trend of positive development of reverse extruder.

近年来又瞄准国外挤压技术的发展趋势，积极研发反向挤压机。

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The theory and characters of side extrusion were introduced, the differences between side extrusion and direct extrusion, reverse extrusion were discussed.

简要介绍了侧向挤压的原理、特点及其与正挤压、反挤压比较的优缺点。

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The theory and characters of side extrusion were introduced, the differences between side extrusion and direct extrusion, reverse extrusion were discussed.

简要介绍了侧向挤压的原理、特点及其与正挤压、反挤压比较的优缺点。

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