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Concrete and Mortar Recipes.

Concrete for foundations ��b�p�̃R��N��[�g�̓Z��g�ƍ��E��~�b�N�X��P�F�R

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Mortar for bricklaying and pointing ��K�{�H�p��^��̓Z��g�ƍ��P�F�R

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