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ASTM...
ASTM D1857/D1857- M-18 + Redline ...
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BS EN IEC...
BS EN IEC 61784-5-2:2- 018 Industrial ...
1.1 ,This test method covers the observation of the temperatures at which triangular pyramids (cones) prepared from coal and coke ash attain and pass through certain defined stages of fusing and flow when heated at a specified rate in controlled, mildly reducing, and where desired, oxidizing atmospheres.