the wedge-shaped central block, or voussoir, at the apex of an arch

listen to the pronunciation of the wedge-shaped central block, or voussoir, at the apex of an arch
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تعريف the wedge-shaped central block, or voussoir, at the apex of an arch في الإنجليزية الإنجليزية القاموس.

The wedge-shaped central block, or voussoir, at the apex of an arch
keystone
the wedge-shaped central block, or voussoir, at the apex of an arch
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