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7 0 . In extrusion of metals, which of the following statement is true? A . Speed of the extruded material is same as that
In extrusion of metals, which of the following statement is true?
A Speed of the extruded material is same as that of ram speed
B Redundant work is a function of the die angle
C Relative motion between the billet surface and the container wall is always present
D Hollow ram is used for indirect extrusion
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