| 摘要 |
The extrusion head has a body which accommodates a male element and which defines, in co-operation with the male element, a passage for the material to be extruded. The passage extends around the male element and leads outward through an extrusion hole located proximate to an end of the head. The end of the male element which is orientated in the direction of flow of the material has at least one channel through which material is delivered inside the flow of material which flows out of the extrustion hole.
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