Computer · Building Materials
IS 4031 (भाग 5):1988 के अनुसार परीक्षण किए जाने पर पोर्टलैंड पॉज़ोलाना सीमेंट (PPC) का न्यूनतम प्रारंभिक जमाव काल (initial setting time) कितना होता है?
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