{HEAD ~ The packing density} is {TAIL ~ more preferably 0.6 1.3 kg/l. Herein}, bulk volume refers to an apparent volume including any vacant space 
is
{ HEAD ~ The packing density } is { TAIL ~ more preferably 0.6 1.3 kg / l. Herein } , bulk volume refers to an apparent volume including any vacant space
HEAD HEAD HEAD HEAD HEAD HEAD HEAD REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH