| 摘要 |
A sheet of reinforced tar is produced by repetitively coating a mesh with hot tar until all of the voids in the mesh are filled. The mesh employed may include relatively heavy gauge strands interwoven with light gauge strands to reduce the size of the voids and reduce the number of coatings necessary to produce the sheet; alternatively, a layer of loosely woven material may be combined with the mesh to augment the base for the coatings of hot tar.
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