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Road utility shaft cover grid has non-vertical separation line between frame and grid
Road utility shaft cover grid has non-vertical separation line between frame and grid
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机译:道路公用事业井盖格栅在框架和格栅之间具有非垂直分隔线
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摘要
A vertical shaft from a road to a sub-surface installation is covered by a rectangular metal grid within a surrounding frame. The metal grid pivots (4) along a vertical plane which is intersects the frame/grid separation line (8).
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