单词 | bank gravel |
例句 | Where blue gravel or hardpan and clean bank gravel are procurable, a good road may be made by mixing the two together. The Future of Road-making in America Run of Bank Gravel.—When run of bank gravel is permitted either for one course or two course work, the size shall not exceed that specified for bottom or top course. American Rural Highways Concrete.—A 1-7 bank gravel concrete was used for the abutments and a 1-5 bank gravel concrete for the other parts of the bridge. Concrete Construction Methods and Costs The materials used for the block were Sandusky Portland cement and ¾-in. bank gravel well balanced from fine to coarse. Concrete Construction Methods and Costs Two grades of concrete were used, a 1-3-6 bank gravel concrete for the invert and a 1-2-4 bank gravel concrete for the arch. Concrete Construction Methods and Costs |
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