| 摘要 |
PCT No. PCT/SE82/00264 Sec. 371 Date Sep. 21, 1983 Sec. 102(e) Date Sep. 21, 1983 PCT Filed Aug. 19, 1982 PCT Pub. No. WO83/02575 PCT Pub. Date Aug. 4, 1983.An elongated safety bar comprises first and second spaced apart flanges and first and second webs which interconnect the associated side edges of the first and second flanges, the second flange, when viewed in cross section, including a flat central portion, and the first flange, when viewed in cross section, including a central portion which is parallel to the flat central portion of said second flange, and opposite generally semicircular end portions, these end portions extending away from the side of an imaginary plane defined by the flat central portion of the first flange opposite the side facing of the second flange. The second flange is longer, viewed in cross section, than the first flange, thus providing the safety bar with a closed, generally trapezoidal-shaped cross section.
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