B27—WORKING OR PRESERVING WOOD OR SIMILAR MATERIAL; NAILING OR STAPLING MACHINES IN GENERAL
B27N—MANUFACTURE BY DRY PROCESSES OF ARTICLES, WITH OR WITHOUT ORGANIC BINDING AGENTS, MADE FROM PARTICLES OR FIBRES CONSISTING OF WOOD OR OTHER LIGNOCELLULOSIC OR LIKE ORGANIC MATERIAL
Procedes pour la preparation de resines uree-formaldehyde, liant et materiau lignocellulosique lie comprenant une resine ainsi preparee et procede utilisant une telle resine pour lier ensemble deux surfaces lignocellulosiques