【第 2 段建议】: 1. "and Feeder and Feeder" - 重复的 "Feeder" 应该删除。 2. "3-stage Crushing Scheme ---" 中的破折号应替换为标准的破折号（如 "—" 或使用连续的三个短横线 "---"）。建议使用后者。 --- 【第 3 段建议】: 1. "lead" should be "leads" in "Although this mode leads higher investment expenditures inevitably." 2. "the emergence of material layers which function as the protection layers" should be revised to "the emergence of material layers that function as protection layers." 3. "same power" should be "the same power" in "Under the premise of using same power." 4. In "SBM limestone crushing plant with a capacity of 500 tons an hour," it should be "500 tons an hour" to "500 tons per hour." 5. "and dressing of material" can be modified to "and dressing of materials." 6. "250TPH Tailing &Construction Waste Crushing Plant" should have a space between "&" and "Construction." 7. "Youtube" should be consistently capitalized as "YouTube." 8. "Insta" should be "Instagram" for clarity.