Connecting devices for technical means for fueling, pumping, loading-unloading, transport and storage of raw oil and petroleum products. Types, basic parameters and sizes. General technical requirements
Yttrium and its oxides. Method of determination of such impurities as oxides of praseodymium, neodymium, samarium, europium, terbium, dysprosium, holmium, erbium, thulium and ytterbium
