pure zinc ingot

例句：

1. 1. The pure zinc ingot is used to make electrical contacts.
   纯锌锭用于制作电气接触点。
2. 2.The pure zinc ingot was melted down to extract the metal.
   纯锌锭被熔化以提取金属。
3. 3. The pure zinc ingot is a valuable resource for industrial use.
   纯锌锭是工业用途的宝贵资源。