| 摘要 |
PCT No. PCT/GB92/01598 Sec. 371 Date May 4, 1994 Sec. 102(e) Date May 4, 1994 PCT Filed Sep. 1, 1992 PCT Pub. No. WO93/05236 PCT Pub. Date Mar. 18, 1993An apparatus comprising a plurality of releasably connected modules adapted to be placed on a road surface for arresting the progress of a vehicle. Each module is equipped with a number of blades which can be protruded or retracted to respectively arrest or allow the passage of vehicle thereover. The modules are interconnected in a manner which enables simultaneous actuation of all the blades and compensates for the camber of the road surface or the misalignment of the modules.
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