Building Materials
Sapwood consists of

Innermost annular rings around the pith
Thin layers below the bark
Thin fibre which extends from the pith outwards and holds the annular rings together
Portion of timber between heartwood and cambium layer

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Building Materials
A queen closer is a

Brick having the same length and depth as the other bricks but half the breadth
Brick with half the width at one end and full width at the other
Brick laid with its length parallel to the face or direction of wall
Brick laid with its breadth parallel to the face or direction of wall

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