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The thickness of a timber frame may vary between _______(a) 20-35 mm(b) 60-75 mm(c) 20-35 cm(d) 60-75 cmThe question was posed to me in quiz.The origin of the question is Door Frames topic in section Doors, Windows and Ventilators of Construction & Building Materials |
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Answer» Correct CHOICE is (b) 60-75 mm |
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