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________ is a semi-rigid material and it forms an excellent impervious layer of damp proofing.(a) Hot bitumen(b) Mastic asphalt(c) Bituminous felts(d) Metal sheetsI have been asked this question in my homework.The above asked question is from Dampness in section Damp Proofing, Water Proofing and Termite Proofing of Construction & Building Materials |
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