A 10g Steel Marble Is Spun

The tube has a 12cm diameter. The tube shown in the figure is 12 in diameter. A 10 steel marble is spun so that it rolls at 150 around the inside of a vertically oriented steel tube.

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Bodyjewellery 16g 16 Gauge 1 2mm 5 16 8mm Steel Lip Monroe Ring Labret Ear Stud Bar Lot Bbhl Body Piercing Jew Piercing Jewelry Body Piercing Jewelry Piercings

Bodyjewellery 16g 16 Gauge 1 2mm 5 16 8mm Steel Lip Monroe Ring Labret Ear Stud Bar Lot Bbhl Body Piercing Jew Piercing Jewelry Body Piercing Jewelry Piercings

Source : pinterest.com