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Method and apparatus for chemical heat treatment of steel parts utilizing a continuous electric furnace
United States Patent 4455177
2Â¥2014-09-01 19:50:01
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yuan002003

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2Â¥: Originally posted by peterflyer at 2014-09-01 19:50:01
Method and apparatus for chemical heat treatment of steel parts utilizing a continuous electric furnace
United States Patent 4455177

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