grind stone

常見例句

We suggest sharpening on a wet stone because it cleans the pores of the sharpener dissipates frictional heat and facilitates smooth sharpening action.
我們建議使用一塊弄溼了的磨石，因爲(wèi)研磨液躰能幫助清潔磨具上的孔，能散去摩擦産生的熱量，還能使磨刀的動作更加順滑。
In this cavern are three massive stone wheels, each with a huge pole through its centre as an axle.
洞裡有三個巨大的砂輪，每個砂輪的中心穿過一個巨大的桿作爲(wèi)輪的軸心。