| 摘要 |
<p>In a security vestibule (1) entry for controlled access to banks and the like enclosures, two walls (9,10) of the vestibule have substantially circular arc bases, different diameters (D,d), and respective angular breadths (A,a) whose sum is at least 360 DEG , being mounted on respective concentrical circular slideways (3,7; 4,8) and forming vestibule (1) doors; the security vestibule is therefore reliable, uncommonly simple in construction, and compact in size.</p> |
