| 摘要 |
A row of elongated parallel bars is provided each having spaced opposite ends. At their opposite ends the bars are connected by two elongated spacing and connecting strips extending along the row and consisting of elastically yieldable material. Each of these strips is provided on one side with longitudinally spaced recesses each accommodating a portion of one of the bars in mating relationship, and at the other side intermediate consecutive ones of the recesses the strips are provided with slots extending towards the one side to facilitate rolling up of the grate in the direction towards the one side.
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