| 摘要 |
The dental hand-piece is made completely of plastic and in one piece. It consists of a central, tubular, body (1) which comprises two portions (1a), (1b) which are slightly bent and joined together and has, in the area where they join and whose concavity (5) faces outwards, a pair of elongated bevelled edges (6), (7) which are symmetrically positioned with respect to the longitudinal plane of symmetry of the body. <IMAGE>
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