railway DFCCIL Executive 2025 Mock Test Construction Materials and Management Cement

निम्न में से कौन-सा IS कोड सिरेमिक टाइल का वर्गीकरण और विशेषताएँ बताता है?

1
IS 12269 ∶ 1984
2
IS 13712 ∶ 1993
3
IS 2386 भाग ।
4
IS 10262 ∶ 2009
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