| 摘要 |
<p>The door has crank handles at the end of a stop bar (68), wedged onto a shaft (46) which pivots inside a box (48) fixed on the interior face of the door (1). During the first part of the movement of the bar (68), the shaft turns a cam and friction roller inside a box (48) that unbolts the door. When this point is reached, a finger on the end of the shaft, which is on the outside of the box, comes into contact with stop (7) on the fixed door frame, so that further rotation of the shaft pushes the door open.</p> |
