Classification opinions
… cellular plastics, mineral wool, expanded mica or vermiculite, wood fibres, etc.). Adoption : 1959 … 2. … for use in the assembly of metal structures (racks, sets of shelves, furniture, stairs, scaffolding, roofing frameworks, … bolts, various types of equipment (machines, railway track, conveyor track, monorails, mobile cranes, piping, etc.). …