| 摘要 |
<p>There is a fastening component between one or more suspension chains and a connecting piece on a single-rail suspension track, as used in underground minino and tunnel engineering. A roughly C-shaped loading loop shackle has a thread with a nut on its bottom shank end. Its top shank incorporates a bent section, combining with the nut to hold a fishplate.S The loop may be cylindrically shaped in the bottom horizontal shank area, and roughly widened to an oval higher up. The space between it and the fishplate can widen upwards in a trapezoid shape. The load bearing capacity is significantly enhanced, and mounting is quick and secure.</p> |
