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Wrapping & Packing: Each article packaged separately and identified on outside of package. Place in cardboard box or paper bags, packed to prevent shifting of contents. Always use paper bags, never use plastic bags or containers that do not allow air flow. ..
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i hope it helps to much i know this kinds because my father is an teacher
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Because it was very difficult to get.
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They developed many new techniques for buildings and invented, concrete,roman roads, arches, and aqueducts
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