tumbling barrel การใช้

• A tumbling rough is placed into a tumbling barrel with abrasive grit and water.
• "Centrifugal barrel tumbling " uses a tumbling barrel at the end of a rotating arm to add centrifugal forces to the barreling process.
• The crowd assaulted the warehouse, broke down the doors and out the windows, and began to roll and tumble barrels of flour into the street where they were fell upon by those present.
• Powder mills were driven by a power source such as windmill, water mill or horse mill, and contained rollers for grinding or a pilon for pounding the ingredients of gunpowder together, as well as presses and tumbling barrels and sieves for compacting, granulating, drying, grading and packaging the powder.