1·As jade is of hard texture, carving is not done with a steel graver, but with emery by way of grinding.
由于玉质地很硬，不能用钢质雕刻刀雕刻，用磨光的金刚砂来雕刻。
2·Stainless steel sheet with polished surface processed with fiber emery wheel.
用纤维砂轮加工的不锈钢板材的表面。