If a woman must work in a manual labour job, then she may wear pants, IMO. For the sole purpose of safety. No sense in getting pulled into a machine. Otherwise, wear a dress or a skirt.
Still, I think it's unfortunate that women are being thrust into the workplace at all, and brainwashed by society to think that they should be there. Women are designed by God to be the nurturers, and men are designed to be the workers.
"Modesty in woman is a virtue most deserving, since we do all we can to cure her of it"
- Author unknown.