Classification opinions
… paperboard, cellular plastics, mineral wool, expanded mica or vermiculite, wood fibres, etc.). Adoption : 1959 … … m and a width of from 0.30 to 1 m, used in buildings, (in casting concrete floors, etc.). Adoption : 1967 … 6. … partitions, ceilings, etc. and for attaching electric cables or other conduits, junction boxes, etc. Adoption : …