【第 2 段建议】: 1. "one of which is about refractory material preparation." - 应改为 "one of which is related to refractory material preparation." 2. "the customer purchased from SBM MTW138 Grinding Mills" - 应改为 "the customer purchased MTW138 Grinding Mills from SBM." 3. "360cm2 /kg" - 应改为 "360 cm²/kg"（添加空格和正确的平方符号）。 4. "Actually, the applying effect was satisfying with good-quality wear-proof parts and large production capacity.Manager Wang, the state-owned enterprise" - 在“capacity.”和“Manager”之间添加空格。 5. "wear-proof parts" - 更常用的说法是 "wear-resistant parts" (可选，但在专业术语中更合适)。 6. "window.onload = window.onresize = function (){" - 代码应与文本内容分开，移除这部分以保持文本的连贯性。