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.
Grain Mills are used for grinding grain (ex. Wheat grain) and that results in a fine 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.
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.
The germinated pollen grain is empty of the male gamete nucleus.
There is no differrence .
Coarse is ruff/hard, and fine grain is smooth/ soft!
"http://wiki.answers.com/Q/What_is_the_Difference_between_a_seed_and_a_grain"
the size of the grain