Looks like your basic garden variety Trachycarpus fortuneii to me.

"Because their leaves are so as falls?" -- I'm not quite understanding this, but I think you are asking why the leaves curve in the middle with the leaf tips drooping downward, rather than being stiff and upright?

It's normal for Trachycarpus. Some plants do this more than others. Some specimens have very droopy downward pointing foliage tips, others have more stiff, upright foliage. Either way, they are perfectly healthy and normal.

Yup-Chinese Windmill Palm.

Variable in the amount of droop in the leaflets.

It also looks like a normal healthy Trachycarpus to me! Some have leaflets that droop more than others, but it doesnt usually have too much to do with growing conditions (they are probably stiffer in sun though).

Trachycarpus fortuneii

what zone are you?