There are several post mills in the countryside.

Roller mills are commonly used in the milling industry.

The roll mills are used in the manufacturing process.

Stamp mills were commonly used in the mining industry.

The stamping mills were used to crush ore and extract minerals.

The steel mills in this city have been operating for over a century.

The sugar-mills in this region produce tons of sugar every year.

The sugar mills in this region produce tons of sugar every year.

Tumbling mills are commonly used in the mining industry for grinding ores.

The wind-mills on the hill were spinning in the breeze.