[2-step gravimetric study of mine dust].
D004391:Dust / Q000032:analysis*; D005374:Filtration / Q000295:instrumentation; D008906:Mining; D010316:Particle Size; D012822:Silicon Dioxide / Q000032:analysis; D013046:Specific Gravity; D014586:USSR
D004391:Dust; D012822:Silicon Dioxide
Dvukhstupenchatoe gravimetricheskoe issledovanie runichnoĭ pyli.