【第 1 段建议】: 1. "lmpact"应为"Impact"（大小写错误，字符“l”应为“I”）。 2. "Sand-making"应为"Sand Making"（不需要连字符）。 3. "Artificial Sand Makin"应为"Artificial Sand Making"（拼写错误）。 请修正这些问题。 --- 【第 2 段建议】: 1. "We provides" should be "We provide" (subject-verb agreement). 2. "We provides" (second occurrence) should be "We provide" (subject-verb agreement). 3. "performmance" should be "performance" (spelling error). 4. "economy development" should be "economic development" (correct usage). 5. "from operator to operator" could be rephrased for clarity, but this is a stylistic suggestion rather than an error. 无错误 --- 【第 3 段建议】: 发现的错误： 1. "Materials (brochures, catalogs）" - "catalogs）" 应该为 "catalogs)"。 2. "Demand(multiple):" - 在 "Demand" 和 "(multiple):" 之间需要一个空格，应该为 "Demand (multiple):"。 3. "WhatsApp:+86 13761974616" - "WhatsApp:" 和 "+86" 之间应该有空格，应该为 "WhatsApp: +86 13761974616"。 4. "Sales Hotline: 0086-21-58386189" - 内部的格式一致性，应该和后面的 "0086-21-58386176" 使用统一的空格或无空格。