{HEAD ~ A combination} grinding {TAIL ~ machine} 8, wherein the workpiece support mechanism comprises a supporting drive unit configured to rotate a crankshaft about a journal axis to thereby revolve a plurality of crank pins around the journal axis, and 
grinding
{ HEAD ~ A combination } grinding { TAIL ~ machine } 8 , wherein the workpiece support mechanism comprises a supporting drive unit configured to rotate a crankshaft about a journal axis to thereby revolve a plurality of crank pins around the journal axis , and
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