Splitting leather is done entirely by hand, and because the blood reeks and stains the hands, it's dirty and tiring. If you just use brute force, the hide might slide around, and it's easy to get bruised by inappropriately applying pressure.
削牛皮完全靠人工，由於腥味濃又有血污，工作環境又髒又累，尤其削牛皮如果只靠蠻力，不僅牛皮會滑動，也容易因用力不