【第 1 段建议】: 1. "lmpact"应为"Impact"（'l' 应为 'I'）。 2. "Submerged Spiral Classifier"中的两个空格应该为一个空格。 3. "Tunnel Boring Machine"和"Pipe Jacking Machine"后缺少标点符号。 4. "Business"、"Product"、"Cases"等标题如果在句子中应考虑是否该加标点。 其他部分无错误。 --- 【第 2 段建议】: 1. "the channel of the rotor wheel" should be "the channels of the rotor wheels" for plural consistency. 2. "and the belt" is misplaced and should be part of the previous phrase, potentially needing a revised structure for clarity. 3. "a new bearing" should be "new bearings" for plural consistency. 4. "is the rotor bearing" may be better phrased as "are the rotor bearings" to align with plural component reference. 5. "the imbalance of other parts on the rotor" could be clarified; if referring to multiple parts, “the imbalances” may be more accurate. 6. "the dynamic balance test should be carried out" should have a comma after "carried out" for grammatical accuracy. 7. Consider adding a period or structure to complete the last sentence, as it appears cut off and incomplete. Overall, some phrases might require re-wording for clarity, ensuring plural usage is consistent throughout. --- 【第 3 段建议】: 1. "hammer heads"应该为"hammerhead"（应使用单数形式）。 2. "the corresponding two groups of hammer heads"应为"the corresponding two groups of hammerheads"（应使用单数形式）。 3. "the material blockage"应为"material blockage"（去掉定冠词）。 4. "the accumulation of materials"应为"the accumulation of material"（应统一为不可数名词）。 5. "the foundation"重复，建议去掉其中一个。 6. "the feed amount"应为"the feed quantities"（应使用复数形式）。 7. "it will also cause abnormal vibration of vertical shaft impact crusher"应为"it will also cause abnormal vibration of the vertical shaft impact crusher"（缺失定冠词）。 8. "machining accuracy or strengt"应为"machining accuracy or strength"（拼写错误）。 --- 【第 4 段建议】: 1. "h or heat treatment" - "h" should be capitalized or removed for clarity. 2. "the main shaft to deform during use, which will cause" - Consider rephrasing for clarity, though it's not a direct error. 3. "vibrate at solid frequency" - Change "solid frequency" to "solid frequencies" for correct pluralization. 4. "the two components that transmit the power" - "the power" should be "power" for stylistic consistency. 5. "the power transmission will vibrate, and this vibration will affect" - "the power transmission will vibrate" should be rephrased; power transmission does not vibrate, consider "the power transmission system may vibrate". 6. "due to untimely inspection and replacement" - Consider "due to insufficient" instead of "untimely" for clarity, though not a direct error. 7. "Do regular inspections of equipment and prevent problems in a timely manner" - "Do" could be changed to "Perform" for formality, though it's more stylistic. 8. "7 Types of Stone Crusher and How to Choose the Best?" - The question mark is not needed. 9. "Demand(multiple):" - There should be a space between "Demand" and "(multiple):". 10. "WhatsApp" is listed multiple times; should be made clear if it's intentionally repeated or an error. 11. "Please fill out the form below, and we can satisfy any of your needs including equipment selection, scheme design," - Consider rephrasing for conciseness; no direct errors. --- 【第 5 段建议】: 1. 将括号中的中文句号改为英文句号，即 "brochures, catalogs）" 应改为 "brochures, catalogs)"。 2. "WhatsApp" 前缺少空格，应该为 "WhatsApp: +86 13761974616"。 3. "Copyright © 2026" 中的年份应保持更新，确认是否为当前年份。 4. "PPC参数传递" 应保持一致的英文或中文，建议为 "PPC Parameters Passing" 或 "PPC参数传递"，请选择一种语言风格。