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