They are all equally precise, because the amount of yarn that you will need for a sweater varies by much more than the differences between those numbers.
31 dm has 2 sig fig 312 cm has 3 sig fig 3 m has 1 sig fig 3124 has 4 sig fig 3124 mm has the most significant figures (4), so is "more precise" than the rest. [Though for yarn, being that precise is a not a good idea as yarn stretches - that's why it's usually sold by weight for a given ply, with a given approx length.]
A Bill Cosby sweater is another term for a Cosby sweater, an oversized sweater featuring a loud, kitschy pattern.
Anything that comes into contact with anything else generates friction. However, most of the time, this amount of friction, and the heat it produces, is so small that it is undetectable without extremely precise instruments.
there isn't a prefix for sweater
The sweater was made of wool. They attempted to make a sweater from the bags.
A sweater that buttons up in the front is called a cardigan.
Hannah Montana sweater
A sweater may be any colour.
It's an argyle sweater, not a sweater vest.
The static charge on your sweater can attract your hair due to opposite charges. When you pull the sweater over your head, friction between the sweater and your hair creates an electrical charge, causing your hair to stick to the sweater.
sweater fabric consumption formula
The possessive form is: the girl's sweater.