said floating support means of said conveying unit includes two substantially the same rear floating support mechanisms that support at least two places of said rear side frame of said conveying unit, as well as a front floating support mechanism that supports {HEAD ~ at least one place} of {TAIL ~ said front side frame} 
said floating support means of said conveying unit includes two substantially the same rear floating support mechanisms that support at least two places of said rear side frame of said conveying unit , as well as a front floating support mechanism that supports { HEAD ~ at least one place } of { TAIL ~ said front side frame }
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL