| 摘要 |
A matrix releasably mounted on an elongated matrix shoe is pressed by end faces of a pair of spring-biased clamping levers tiltable at outer ends about axes parallel to the axis of the matrix against an upwardly extending abutment face of the shoe, and a tool including a slide movable between the clamping levers to spread the same apart and having a withdrawal lever tiltable above the slide about an axis extending transverse to the latter and carrying a pin arranged to enter a catch bore provided in the matrix for withdrawing the matrix in the direction of the elongation of the shoe from the latter.
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