| 摘要 |
<p>1,103,019. Gratings. CONSTRUCTION SPECIALTIES, Inc. 28, Nov., 1966 [17, Dec., 1965], No. 53205/66. Heading E1G. [Also in Division D1] A grating comprises a number of H-section support bars 10, having wear strips 24 removably attached to the upper flange 14, the bars being held parallel to each other by key members 28. The webs 16 of the support bars are formed with a plurality of double-keyhote openings to allow passage of cylindrical members 28 having wing flanges 30, 32; the members 28 being rotated to lock the webs 16 in slots 34 in flanges 30, 32.</p> |
