railway RRB JE (CBT I + CBT II) Mock Test 2024 Construction Materials and Management Bricks and Mortar

मृत्तिका ईंटों के विशिष्ट आकार के आयाम __________में दिए गए हैं।

1
IS 3461-1966
2
IS 1464-1969
3
IS 6165-1971
4
IS 3951-1975
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