| 摘要 |
<p>The hook (10) has locking units (20) e.g. C-shaped lock, occupying a retracted position in the hook and a locking position. The locking units not oppose vertical movements of inlet and exit of a horizontal crosspiece of a support element of a shuttering panel in an opening (11) of the hook in the retracted position, and the locking units oppose an extraction of the crosspiece in the locking position. The locking units associated with overlocking units constituted of a horizontal transversal axle, a horizontal and transversal rod (30) and an oblong and vertical porthole (31) to manual unlock.</p> |
