The mass of fibers is characterized as possessing a bulk density of from 0.02 to 0.40 gram/cubic centimeter, and {HEAD ~ each} of the fibers is characterized as having {TAIL ~ an average diameter} of from 3 to 10 microns 
is characterized as having
The mass of fibers is characterized as possessing a bulk density of from 0.02 to 0.40 gram / cubic centimeter , and { HEAD ~ each } of the fibers is characterized as having { TAIL ~ an average diameter } of from 3 to 10 microns
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 OTH OTH OTH REL REL REL REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH