共 50 条
- [1] ELECTROLYTIC EXTRACTION OF LEAD FROM PYRITIFEROUS RAW-MATERIALS METALL, 1979, 33 (09): : 925 - 929
- [4] EXTRACTION OF MEDICINAL SUBSTANCES FROM VEGETABLE RAW-MATERIALS WITH A ROTARY EXTRACTOR KHIMIKO-FARMATSEVTICHESKII ZHURNAL, 1975, 9 (08): : 39 - 41
- [7] NEW PROCESS FOR IMPROVED EXTRACTION OF RAW-MATERIALS BY PYROLYSIS ERDOL & KOHLE ERDGAS PETROCHEMIE, 1978, 31 (07): : 328 - 328
- [8] ECONOMICS ON RAW-MATERIALS BY PLANNED CUTTING OF COMSUMPTION OF RAW-MATERIALS LEBENSMITTEL INDUSTRIE, 1975, 22 (10): : 449 - 450
- [9] INDUSTRIAL RAW-MATERIALS FROM THE SOIL - THE OPPORTUNITIES OF AGRICULTURE IN SUPPLYING RAW-MATERIALS TO INDUSTRY IN GERMANY UMSCHAU DAS WISSENSCHAFTSMAGAZIN, 1982, 82 (11): : 359 - 362