. . "0"^^ . . . . . "0"^^ . . "113490683"^^ . . "Haber process"@en-us . "Haber process"^^ . "112727804"@en-us . . "13490683-n"^^ . "Haber-Bosch process"@en-us . . "an industrial process for producing ammonia from nitrogen and hydrogen by combining them under high pressure in the presence of an iron catalyst"@en-us .