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A Rotary Vacuum Filter Drum consists of a cylindrical filter membrane that is partly sub-merged in a slurry to be filtered. The inside of the drum is held lower than the ambient pressure. As the drum rotates through the slurry, the liquid is sucked through the membrane, leaving solids to cake on the membrane surface while the drum is submerged.
Seven-inch single for "Amen, Brother" The Amen break is a drum break that has been widely sampled in popular music. It comes from the 1969 track "Amen, Brother" by the American soul group the Winstons, released as the B-side of the 1969 single "Color Him Father". The drum break lasts seven seconds and was performed by Gregory Coleman.