Most fabrics are knitted or woven, but some are produced by non-woven processes such as braiding, felting, and twisting. Applied loosely, 'fabric' also includes laces, meshes, and nets. See also textile.
I think having any lemons or drinking lemon juice (even straight) is good for you. I don't really know the health benefits, but that is what I have heard. I never heard about it being bad for one's teeth, but I suppose it could be.
Lemon juice is less acidic than the gastric acid -- primarily Hydrochloric acid -- already present in the body. Gastric acid has a pH of between 1-2. Lemon juice has a pH of 2-3. That will dilute (i.e., lower the acidity) of stomach acid, but that acid will be neutralized in the small intestine by the presence of and production of bicarbonates. There is no significant effect on the body's acidity from consuming lemon juice.