. . . "112693259"@en-us . . . . . . . . . "109682098"@en-us . . "the process whereby heavy molecules of naphtha or petroleum are broken down into hydrocarbons of lower molecular weight (especially in the oil-refining process)"@en-us . . . "0"^^ . "cracking"^^ . . . . . . "cracking"@en-us . . . . . . . . . . . . . . "113453861"^^ . . . "0"^^ . . "13453861-n"^^ . . . . .