| 摘要 |
This component comprises, on each of its jaws 10, 11, two straight sets of teeth 12, 14 and 16, 18 separated by a concave part 17, 19. On at least one of the jaws the planes of the front 12 and 14 and rear 16 and 18 sets of teeth are mutually inclined at a relatively small acute angle, and intersect along a line which coincides with the crest of the most internal front tooth. The wrench thus has two parallel clamping positions for each adjustment of the articulation pin 4 in a notch 8 of the slot 2 made in the fixed branch 1. <IMAGE>
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