| 摘要 |
<p>Soil treatment comprises applying an aq. soln. of a formaldehyde-based pre-condensate (I) contg. a condensation initiator (II) in an amt. sufficient for condensn. to be completed within a predetermined period of time not exceeding 24 hr. Pref. (I) is a urea-formaldehyde pre-condensate (Ia).</p> |
