| 摘要 |
<p>The picker comprises recesses or projections in the upper region of the striker member, facing towards the picker body. In the end face of the picker body, in the same positions, are mating projections or recesses, to provide absolutely secure locking of the striker member. The projections and recesses may be provided at the edges, or in the centre, of the picker body and the striker member. Also they, may be conical in shape.</p> |
