摘要:A Rotary kiln is a pyroprocessing device used to raise materials to a high temperature (calcination)[阅读全文:]
摘要:Rolling is a fabricating process in which the metal, plastic, paper, glass, etc. is passed through a[阅读全文:]
摘要:Refined coalRefined coal is the product of a coal upgrading technology that removes moisture and cert[阅读全文:]
摘要:Rare earth metals As defined by IUPAC, rare earth elements or rare earth metals are a collection of s[阅读全文:]
摘要:A rivet is a permanent mechanical fastener. Before it is installed it consists of a smooth cylindrica[阅读全文:]
摘要:The rail profile is the cross sectional shape of a railway rail. perpendicular to the length of the r[阅读全文:]
