| 1. | Reduce about 10 of the extrusion pressure
 
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 | 2. | Reduce about 15 of the extrusion pressure
 
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 | 3. | Analysis of influencing factors on extrusion pressure for cold extrusion forming of splined tube
 
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 | 4. | Some fuzzy concepts exist in resolving forward extrusion solid object ' s unit extrusion pressure with slip line technique in current documents
 
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 | 5. | In addition , the principle for increasing extrusion pressure and determining way for key parameters on each sub - zone was discussed
 
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