【第 1 段建议】: 1. "lmpact"应为"Impact"（字母错误）。 2. "EPCO"应为"EPC"（一般表达，常用缩写）。 --- 【第 2 段建议】: 1. "ar" should be removed as it appears to be a typographical error. 2. "the differences of these two crushing methods very clearly" should be changed to "the differences between these two crushing methods very clearly" for grammatical correctness. 3. "such as basalt etc." should be changed to "such as basalt, etc." for proper punctuation. 4. "with medium hardness and below" should be changed to "with medium hardness and below," to clarify the sentence and provide proper punctuation. 5. "etc." is also needed after "such as limestone" for consistency with the previous list. 6. "has" in "sand making machine has high efficiency" should be "have" to match the plural subject "crushing methods." 7. "at center" should be "at the center" for precision. 8. In "has low production capacity", consider adding more context or rephrasing for clarity, such as "which results in low production capacity." 9. "has different main wear-resistant parts" could be more specific by saying "have different main wear-resistant parts" to agree with the plural subject. Make these changes for a more polished and correct text. --- 【第 3 段建议】: 1. "around protecting plate" 应为 "outer protecting plate"（以保持一致性）。 2. "the around protecting plate" 应为 "the outer protecting plate"（以保持一致性）。 3. "WhatsApp" 在文本中出现多次，需确认格式一致性，建议只用一次。 4. "Contact Us" 前面缺少标点。 5. "Demand(multiple):" 中的括号需要留有空格，可改为 "Demand (multiple):"。 其他部分无拼写、单复数或标点错误。