| 摘要 |
The clamp ring is divided at a point (3) where it has a recess at one free end. A lock tongue (4) inserts into the recess with a cogged rod (7) at the other free end. A gearwheel (7) works in conjunction with the rod to adjust the diam. of the clamp ring. The gearwheel is prevented from rotating backwards by a friction or hook device. |
