用bottom pouring造句子，“bottom pouring”造句

In bottom pouring, the molten steel is poured into a central trumpet, from where it flows through runners to the bottom of a number of ingot moulds. The steel rises slowly in the moulds without turbulence.

In bottom pouring, the molten steel is poured into a central trumpet, from where it flows through runners to the bottom of a number of ingot moulds.