Chemical stains are thought to be the result of oxidation and enzymatic action on certain materials stored in the wood cells.
(Chemical stains; are thought; ) (Chemical stains; to be; the result of oxidation and enzymatic action on certain materials) (certain materials; stored; L:in the wood cells)
Chemical stains Chemical stains certain materials
are thought to be stored
the result of oxidation and enzymatic action on certain materials
L:in the wood cells