| 摘要 |
The ultra-light (of a weight not greater than 1.5 kg) and handleable machine, according to the present invention, is characterised by a running longitudinal protuberance 95, on the back, which has, at least corresponding to the end 09' of the end of the travel of the engraving tool 74, that is to say the one which is distant from the operator or the separation operation, a profiled part 09 in the shape of a wedge, made into a steel plate 09, forming a single body with the framework or a part 9' of the latter and/or with the back 95 and having an opening 90 connecting to the arrow head profiled part 09 for the purpose of checking that the first point of contact between the arrow head and the tile 0 is situated at least slightly within the tile, and is characterised in that the upper surface of the coverings 6, 6' comprises channels 66 arranged at distances which correspond to those 66' figuring in millimetres on the scale 93. <IMAGE>
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