| 摘要 |
<p>Each of the fixed and through-way door-leaves is joined by a swivel arm to a door-frame. The swivel arm of the through-way leaf is fixed by a locking element (8) released from the fixed lead. A first slide piece (9) is joined to the door-frame side end of the swivel arm of the throughway leaf and is movable in a slide-guide(10) in or on the door-frame, A second slide-piece (11) joined to the door-frame side end of the swivel arm of the fixed leaf is movable in the slide guide and has a thrust piece (12) engaging with and disengaging from the locking element pre-tensioned towards its locking position by a spring (8a). i</p> |
