【第 2 段建议】: 1. "not only have huge demand" 应改为 "not only has huge demand" (主谓一致错误) 2. "such as large fineness modulus, high dust pollution，large footprint and etc." 应去掉 "and etc." 并将逗号改为英文逗号 (标点和用词不当) 3. "the output keeps stable" 更常用的表达为 "the output remains stable" (用词) 4. "to customer" 应为 "to the customer" (冠词缺失) 5. "limestone(0-10mm)" 应为 "limestone (0-10 mm)" (空格和单位格式) 6. "Final Product: 0-0.075mm(stone powder),0.075—5mm(manufactured sand)" 应为 "Final Product: 0-0.075 mm (stone powder), 0.075–5 mm (manufactured sand)" (空格和单位格式) 7. "high-grade concrete mater" 应为 "high-grade concrete materials" (拼写错误) --- 【第 3 段建议】: 1) "The gravel is crushed inside VU impact crusher" -> "The gravel is crushed inside **the** VU impact crusher" 2) "Through feeder, where the materials are graded." -> "through **the** feeder, where the materials are graded." 3) "With the gradation of manufactured sand is precisely controlled," -> "With the gradation of manufactured sand **being** precisely controlled," 4) "the unqualified material is returned to impact crusher" -> "the unqualified material is returned to **the** impact crusher" 5) "to make the powder content in the finished sand adjustable and controllable." -> "to make the powder content in the finished sand adjustable and controllable **.**" (Incorrect end punctuation) 6) "which ensure no wastewater, sludge, dust and noise during production," -> "which **ensures** no wastewater, sludge, dust **,** and noise during production," (subject-verb agreement, and missing comma before 'and') 7) "Footprint" -> "footprint" (lowercase for consistency) 8) "Digitalized Processing, Higher Precision" -> "Digitalized **processing**, higher precision" (lowercase for consistency and punctuation) 9) "digitall" -> "digital" (spelling mistake) --- 【第 4 段建议】: 1. "100 ton an hour" 应为 "100 tons an hour" 2. "500 tons an hour" 前面缺少空格。