{HEAD ~ The number} of {TAIL ~ each type} of preassembled top frame unit maintained in stock ready for assembly may be set in accordance with the demand for different range configurations  
of
{ HEAD ~ The number } of { TAIL ~ each type } of preassembled top frame unit maintained in stock ready for assembly may be set in accordance with the demand for different range configurations
HEAD HEAD HEAD HEAD HEAD HEAD REL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH