Double hammer
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Template:Short description A double hammer is a forging implement used in metallurgy. It operates on puddle balls and blooms by hitting both sides at the same time.[1] Double hammers are made of two blocks attached to rollers which facilitate opposing movement along a set of rails.[2] Double hammers are normally operated by three people at a time: one holding the instrument in place and the other two moving the blocks back and forth.[3]
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