tsar1987 發(fā)表于 2017-8-2 22:18 ; }, {( V5 W" t- {# v' a燒傷,。調(diào)整方向1,冷卻,,2,,砂輪硬度調(diào)軟,3,,粒度在保證粗糙度前提下用粗粒度,,4,降轉(zhuǎn)速