| http://www.w3.org/ns/prov#value | - Pug mills have a relatively gentle action and since the fibers used are rigid and their length is desired to be preserved, the pug mill, as mentioned, can be heated by steam heat 384 so that the resin will remain in a molten form while it is mixed with the fibers and other fill materials such as from the fluffing or loosening step seen in block 318 in FIG. 17.
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