墙壁需要用白漆刷新。The walls need freshening up with white paint.先把门上的旧漆烧掉,再刷新油漆.Burn the old paint off before repainting the door.把墙壁都擦洗干净再刷新油漆.Clean down all the walls before repainting them....
The waste after mercerization produces an effluent containing 5 % NaOH.丝光后产生含碱量5%的废液.The original purpose of mercerization was to improve the luster of cotton fibers.丝光的本来目的是改善棉丝维的光泽.Mercerization of cotton fabrics is st...