热缩指套用于电缆分支叉处的绝缘和密封保护，有二芯、三芯、四芯、五芯的产品。
Heat shrinkable finger sleeve is suitable for protection of insulation and sealing in fork position. It includes two cores, three cores, four cores, five cores.
一些电缆是双芯的，其他的可能有五个、六个、十二个甚至更多芯。
Some cables have two wires while others may have five, six, twelve, or more wires.
柴油车尾气粒子，是城市烟雾的主要组成部分，是由外表包裹着有机化学和五金的碳芯组成的。
Diesel exhaust particles, a major part of urban smog, consist of a carbon core coated with organic chemicals and metals.
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