they are the same they are just used in different kind of sentences.
The invention of water mills for grinding grain occured in the Han dynasty.
Grinding grain into flour.
Coarse is ruff/hard, and fine grain is smooth/ soft!
Grain Mills are used for grinding grain (ex. Wheat grain) and that results in a fine flour.
There is no differrence .
they are gears to grinding stone , grinding stone bucket to pour grain
the women in mesoamerica spent more hours at home because the technology was bad. Their time needed to be spent grinding grain for food.
Coarse is ruff/hard, and fine grain is smooth/ soft!
the size of the grain
"http://wiki.answers.com/Q/What_is_the_Difference_between_a_seed_and_a_grain"
Ground rice is from the rice grain. Semolina is from the wheat grain. Semolina is the one that has gluten.
long grain rice takes longer to cook than converted rice