History of Technology in India, Vol. I: From Antiquity to c. 1200 A.D. v1.c12.s1.t11.3
History of Technology in India, Vol. I: From Antiquity to c. 1200 A.D. v1.c12.s1.t11.3
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v1.c12.s1.t11.3
The two shafts around have ensured air circulation, whilst the timber beams across the main part of the shaft would have continued to divide air flows as well as providing ladder stagings.