Descriptors | Wood, Softwoods, Structural timber, Sawn timber, Planed timber, Wood grain, Wood defects, Knots (wood), Construction materials, Quality control, Grades (quality), Grading (quality), Certification (approval), Acceptance (approval), Approval testing, Inspection, Defects, Marking, Laminates, Visual inspection (testing), Inspection equipment, Test equipment, Dimensions, Deformation, Letters (symbols), Formulae (mathematics), Wood grain, Scribers, Machine tools, Modulus of elasticity, Flaws |