【第 2 段建议】: 1. "Jaw Crusher" should be "Jaw Crushers" for consistency with the plural form used in "three units of CS400 cone crusher." 2. "touched.Mr." should have a space before "Mr." → "touched. Mr." 3. "three cone crushers" should be "three cone crushers again" for clarity and consistency with the previous plural usage. Other than these, the text generally maintains consistency in plural forms within the context.