Draw the grinding wheel to the work piece smoothly and carefully to avoid collision.
Draw the grinding wheel to the work piece smoothly and carefully to avoid collision.
砂轮引向工件时，应均匀和小心，避免冲撞。
Draw the grinding wheel to the work piece smoothly and carefully to avoid collision.
砂轮引向工件时，应均匀和小心，避免冲撞。