因此，研究者们转而使用两层含石墨的导电性聚碳酸酯，各层的内外层都附有一条金属带。
So instead the researchers use two layers of graphite-rich conductive polycarbonate, each flanked by a single metal strip in the inner and outer cladding.
探讨了复合孕育剂中铝量对含砷、锡、铅、钛铸铁石墨球化的影响。
An approach to the influence of aluminium content of inoculant on graphite spheroidization of cast iron containing as, Sn, Pb and ti was made.
结果表明，含氟酸是良好的煤和石墨的脱灰剂，能有效地脱除煤和石墨中的各种矿物质组分。
The results showed that fluorine-bearing acids are good deashiag agent of coal and graphite and can effectively leach out almost all mineral components in coal and graphite.
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