【第 1 段建议】: 1. "on" 应改为 "of"（9 Advantages of Portable Crusher Plant）。 2. "lmpact" 应改为 "Impact"（Vertical Shaft Impact Crusher）。 3. "EPCO" 应改为 "EPC"（EPC）。 4. "Porta" 应改为 "Portable"（9 Advantages on Portable Crusher Plant）。 --- 【第 2 段建议】: 1. "features with complete function" should be "features complete functions" (consider changing to "with complete functions"). 2. "energy-saving and stable performance" should not have a comma before "and": "energy-saving and stable performance". 3. "good energy-saving and crushing effect on dealing construction solid" should be "on dealing with construction solids". 4. "model product in aggregates industry" should be "model product in the aggregates industry". 5. "The portable crusher plant can be moved directly to the production." should be "to the production site." 6. "realize some work including feeding" should be "realize work including feeding". 7. "one is reaching higher efficiency" is missing context and needs revision for clarity. 8. "the working area flexibly" should be "in the working area flexibly." 9. "in fields use" should be "in the field without". 10. "two modes of "crushing first then screening" or "screening first then crushing"" should change " to " for quotation marks. 11. "according to different situation" should be "according to different situations." 12. "can be combined freely into different crushing modes" should include "can be combined freely into different crushing modes," adding a comma before "like". 13. "but also can operate independently with great flexibility as well" should be "but can also operate independently with great flexibility." --- 【第 3 段建议】: 1. "this can greatly help to save lots of amount investments" - 应为 "this can greatly help to save a large amount of investment"。 2. "had little impact on environment" - 应为 "had little impact on the environment"。 3. "It shows that is an environmental protection machine." - 应为 "It shows that it is an environmental protection machine."。 4. "when it as a single machine." - 应为 "when it is used as a single machine."。 5. "More information can visit our website." - 应为 "For more information, you can visit our website."。 6. "Materials (brochures, catalogs）" - 应为 "Materials (brochures, catalogs)" （括号内右侧标点应为英文式）。