两次过筛的细磨耐火材料的英文

double-screened ground refractory material

• 两次:    twice
• 过筛:    riddling; screenin ...
• 的:    4次方是 The fourth po ...
• 细:    thin; slender
• 磨:    mill; millstones
• 耐火材料:    refractory; firepr ...