| 摘要 |
A self supporting shrinking mandrel including an actuator with a plurality of legs, each terminated by a cross member. The legs and cross members are inserted into grooves of a plurality of support members. The grooves and cross members cooperate to hold the support members in place making the entire mandrel self supporting. The actuator is tapered in cross section along the longitudinal axis which causes a positive shrinking action as the support members are drawn toward the longitudinal axis when the actuator is withdrawn from the combination.
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