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Of raw materials to make ALE Series Stroke Stop and Stroke Switch use of carbon steel, ordinary gray cast iron or ductile iron back to BURDEN; reduce the liquid iron in the alloy elements such as Cr, Mn and other content, reducing its molten iron-containing gas; before the next core sand core all the overhead brush paint and the storage period to prevent the sand core to absorb moisture; in rainy days or high humidity of the season, the next best to use torch to the former core cavity, the surface of sand core baking again, in order to reduce sand-fat content; high-temperature casting a small valve in order to facilitate their own exhaust and the reduction of molten iron casting slag produced.

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The influencing factors of soundness were tested by powder ratio. The results showed that steel slag sand was able to be used as fine aggregate. Firmness, f-CaO content, difference of hydrous activity and RO phase were the main factors of powder ratio.

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According to successfully extracting and graphing of uranium anomalies, the self-center uranium anomalies and their close relationship with meandering stream systems have been observed. The uranium anomaly always develops in the distributary and turning place of meandering stream system, and is related with thin sand area (whose sand thickness and sand ratio are less than 30 meters and 40% respectively), thicker coal, fine lithology, but the highest value of uranium anomaly exists in middle sandstone.

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Dodson sanding machine sand cut a large quantity, high precision, sanding pad is soft, medium, hard three to choose from, so that certain of the completion of the more perfect.

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To reveal the complicated stress state of masonry structure in project and the effect of normal stress on shearing behavior,failure form and shearing strength,the shearing strength was obtained through experiments on 54 pieces of minitype sand-lime autoclaved aerated concrete masonry subjected to different normal stress.

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This equipment fits for heating new sand with precoated sand heating method, main fuel is coal or broken hard coke While working, the rotating roller is heated in the furnace, new sand enters into the roller via the feeding tube and will be pushed, upgraded and stirred to be evenly heated under function of scraper.

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In addition, in order to avoid formation contamination by sand cleaning fluid, a special sand pump has been developed, which is easy to operate, uses less equipment, and is low cost and highly efficient .

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Installation technology and application of the long-distance grp sand pipe;2. drainage pipe and field test of GRP sand pipe construction technology, we draw the conclusion that GRP pipe is applicable for drainage pipe of port engineering.

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