Pressure-flaking: applying softer striking tools such as deer's horns and bones or wood to the edge of a stone and putting pressure on it to peel off a small piece of stone.
押圧剥離･･･石材の縁に尖ったシカの角や骨、あるいは木などの柔らかい打撃具を当て、力を加えて微細な石片を剥離する。