| 摘要 |
In a dental handpiece (1) with a tool (2) which evolves heat during operation, and with a coolant exit (3) directed onto the tool (2), where the emergence of the coolant out of the coolant exit (3) can be controlled, the intention is to make it possible to control the coolant emerging from the coolant exit (3), for which reason the tool (2) or a test specimen (4) which can be arranged in place of the tool consists, at least on the surface, of a material which is sensitive to coolant. <IMAGE>
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