black lead meaning in English
【矿物】石墨，笔铅。
Examples
- Connect black lead to metal point on car chassis
连接黑色导线到汽车底盘的金属点上。 - Not only did black lead him to the potters that night
那天晚上布莱克不光带他去找到波特夫妇 - Not only did black lead him to the potters that night . .
那天晚上布莱克不光带他去找到波特夫妇. . - Black leads for wood - cased pencils . classification and diameters
木质外体铅笔的石墨铅芯.分类和直径 - Mechanical pencils . part 3 : black leads . bending strengths of hb leads
机械铅笔.第3部分:石墨. hb铅笔芯弯曲强度