2, there are two lines before and after, increase the size, the stomach is big and PP is mostly ok, this is called adding crotch before and after;
3, the thigh is not stitched, and the hip is the same as the leg. This is called a thong;
4, more transparent than the T-shaped crotch, with a solid seam in the middle, called a first-line crotch;
5, the crotch is like lace underwear, called bikini, also called butterfly crotch;
6, the crotch is not sewn, called seamless pantyhose;
That seems to be all.
7. In addition, there is a difference in style between crotch and cotton crotch.