【第 1 段建议】: 1. "lmpact" 应为 "Impact"（"Vertical Shaft lmpact Crusher"）。 2. "Summary：Raymond mil" 应为 "Summary: Raymond Mill"（冒号格式应为英语标准格式且 "mil" 拼写错误）。 --- 【第 2 段建议】: 1. "liquid lubricants" should be "Liquid lubricants" (capitalize "Liquid"). 2. "Gas lubricant" should be "Gas lubricants" (plural). 3. In the section "4. Semi-solid lubricants," remove "the" before "use" to read "use is also very extensive." 4. "and the replacement should be regular." could be more clearly stated as "and their replacement should be regular." 5. "What kind of lubricants are used by Raymond mills" should be "What kinds of lubricants are used by Raymond mills" (use "kinds" for correct plurality). 6. The phrase "including equipment selection, scheme design, technical support," has an extra space before "technical." Additionally, it is advisable to consistently use a complete list format (e.g. punctuation at the end of each list item) for clarity. For example, in the lubricants section, items 1-4 could each end with a period.