【第 2 段建议】: 1. "ervice"应为"service"。 2. "are lack"应为"lack"。 3. "which will easily cause the hammer to loosen, fall off or break"中缺少逗号，在"fall off"和"or"之间需要添加。 4. "but its toughness is lower, and brittle fracture is prone to occur in the occasion of high impact"中“in the occasion of”应改为“on the occasion of”。 5. "to achieve wear resistance. In order to improve the strength of hammer"中的 "hammer" 前缺少 "the"。 请注意，这些问题均已列出，文本中可能还存在其他潜在的改进之处。 --- 【第 3 段建议】: 1. "double-head…" 应为 "double-head…" 2. "single-head only have one wear surface" 应为 "single-head only has one wear surface" 3. "the crushing strength is not more than 320 MPa, like granite, basalt and limestone." 应为 "the crushing strength is not more than 320 MPa, such as granite, basalt, and limestone." 4. "operator doesn’t" 应为 "operator doesn’t" 5. "causing the hammer to overload." 这句缺少完整主语，建议改为 "which may cause the hammer to overload." 6. "the crushing ratio of impact crusher will be greater" 应为 "the crushing ratio of the impact crusher will be greater" 7. "this will make the hammer consumption serious." 应为 "this will make the hammer consumption serious." 8. "the bolts loose" 应为 "the bolts to be loose" 9. "the hammer is loose or broken" 应为 "the hammer to be loose or broken" 10. "6 points, strictly control" 建议在"6 points"后加逗号，变为"6 points, and strictly control" --- 【第 4 段建议】: 1. "minimizing"应改为"Minimizing"（首字母大写）。 2. "Improve"应改为"improve"（小写）。 3. "The 10 Best Ship Loader Manufacturers in The World"应改为"The 10 Best Ship Loader Manufacturers in the World"（"The"应小写）。 4. "What Is the Cost of Processing One Ton of Gold Ore?"中的"Is"应改为"is"（小写）。 5. "7 Types of Stone Crusher and How to Choose the Best?"中的"Best"应改为"best"（小写），且不应使用问号。 6. "Equipment"和"Materials (brochures, catalogs）"中"）"的右括号应为英文的")"。 7. "To be Our Agent"应改为"To Be Our Agent"（首字母大写）。 8. "After-sales Services & Spare Parts"应为"After-sales Services and Spare Parts"（"&"应改为"and"）。 9. "Life-cycle Service"应改为"Lifecycle Service"（去掉连字符）。 10. "WhatsApp:+86 13761974616"应加空格，变为"WhatsApp: +86 13761974616"。 11. "Sales Hotline: 0086-21-58386189"应改为"Sales Hotline: +86 21 58386189"（添加国际区号+86且将"-"改为空格）。 12. "(function(w,d,s,l,i){w[l]=w[l]||[];w[l].push({'gtm.start':"中的"("的配对括号要关闭。