Horizontal skimming/horizontal hook, skidding, vertical, horizontal skidding/horizontal hook, holding back.
1. A layer of tissue on the surface of a person or organism~. Buckwheat~. A piece fell off~.
2. Leather ~ box. ~ Shoes. ~ Jacket.
3. A layer of things wrapped around or surrounding. It's best to wrap up your new book.
4. (~ son) superficially~. Water~er.
5. (~ son) Some flaky things are lead~. Tofu~er.
6. Tough ~ sugar.
7. Crispy things become tough and lose their flavor after being dampened.