| 摘要 |
The present invention comprises an U shaped arch (1) a shank (2) and two latch devices (3, 4) at both saw (5) ends, each of these devices (3, 4) comprising a body (31) fixed with a longitudinal passage (32) which allows saw (5) control and centering, body (31) comprising a tension screw (33, 34) perpendicularly fixed to passage (32) allowing the possibility of drawing said saw (5) corresponding end in passage (32). |
