Networked Smart Markers – wireless cave back monitoring. Enabling safe and performing cave propagation.
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Amazon.com : Smart Color Art Art Markers, 44 Coloring Markers and 1 Blender, 45 Pack Alcohol Based Dual Tip Permanent Highlighters with Case, Excellent for Adults Kids Marking Drawing Sketching : Arts, Crafts & Sewing
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Amazon.com: School Smart Dry Erase Markers - Bullet Tip - Pack of 8 - Assorted Colors, 0.79 H x 4 L x 6.38 W : Office Products
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