high-quality investment powder 50 pounds/Sack ,100 pounds/drumPerformance: This product is produced originally by British factory, with superior quality, suitable for the casting of K gold and Beryllium copper . Investment powder for casting
... , a very good panner can take a pan with 15 pounds of ore in it and pan it in 10 minutes ... . That is 1.5 pounds per minute, versus 100 pounds in 7 minutes, or 14.3 pounds per minute. The table is ...
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