| 摘要 |
A dental handpiece comprises a rear portion or handle and a front portion or head which are coupled by means of a female member secured to one portion and a male member secured to the other portion, the female member having formed therein a longitudinal slot and a recess shifted angularly in relation to the slot, the male member comprising a projection, one member comprising an elastically deformable portion whereby rotating one member in relation to the other through a predetermined angle permits introducing said projection into the recess, the projection being allowed to expand therein.
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