彩色显像管的质量控制需要利用和回用玻璃泡废料.Quality control of color picture tubes may require the salvage and reuse of the glass envelopes.我弟弟有一台21英寸显像管的落地式电视机.My brother has a console model with a 21 - inch picture tube.电视显像管和荧屏的半透明'&...
The weathering crust eluvial type REE deposits develop widely in southern Hunan.风化壳淋积型稀土矿床,在湘南地区普遍发育.Eluvial tantalite: Eluvial tantalite is found in rubble consisting of fragments and pebbles of varied composition.残积层钽铁...