Lead in solders for the soldering to machined through hole discoidal and planar array ceramic multilayer capacitors.通孔盘状及平面阵列陶瓷多层电容器焊料所含的铅。
MORPHOLOGICAL COMPARISON BETWEEN SPHAEROCOCCUS COLONIES AND EDIACARA DISCOIDAL FOSSILS铁球菌菌落与埃迪卡拉纪盘状化石的形态对比研究