The results show that silver based electric materials ought to be smelted by graphite crucible, the clay crucible is suitable for smelting silver based solder.
结果表明，银基电触头材料应选用石墨坩埚熔炼，银基钎料应选择粘土坩埚熔炼。
The country is rich in minerals such as bauxite, iron ore, lead, gold, precious stones, tin, chromate, anthracite, granite, marble, clay, white sand and graphite.
这个国家拥有丰富的矿产，如铝土矿、铁矿石、铅、黄金、宝石、锡、铬酸盐、无烟煤、花岗岩、大理石、粘土、白砂和石墨。
After experimenting for eight days, he discovered that firing powdered graphite with clay would work, and the hardness of the pencil lead could be varied by varying the ratio of graphite to clay.
他做了八天实验，发觉把石墨粉末和黏土一起烧，就可奏效。笔芯的硬度还会依石墨和黏土的比例而改变。
After experimenting for eight days, he discovered that firing powdered graphite with clay would work, and the hardness of the pencil lead could be varied by varying the ratio of graphite to clay.
他做了八天实验，发觉把石墨粉末和黏土一起烧，就可奏效。笔芯的硬度还会依石墨和黏土的比例而改变。
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