solid paraffin

例句：

1. 1.The solid paraffin is used as a lubricant in the machine.
   固体石蜡用作机器的润滑剂。
2. 2. The paraffin was extracted from petroleum and refined into various products.
   石蜡从石油中提取并精炼成各种产品。
3. 3. The solid paraffin has a high melting point and can be used to make candles.
   固体石蜡熔点高，可用于制作蜡烛。