【第 1 段建议】: 1. "lmpact"应为"Impact"（字母'l'应为'I'）。 2. "Sand-making"和"sand making"格式不一致，建议统一为"Sand-making"或"sand making"。 --- 【第 2 段建议】: 1. "the fixed sand production line is dif" 应为 "the fixed sand production line is difficult to adapt" 2. "1 square stone ≈ 1.6 tons of stone" 应为 "1 square meter ≈ 1.6 tons of stone" 3. "150-party" 应为 "150-ton" 4. "the 150-party mobile sanding machine" 应为 "the 150-ton mobile sanding machine" 5. "the vehicle chassis has high strength and strong pressure resistance;" 此处标点之后应为小写（"the tire sanding machine"）。 --- 【第 3 段建议】: 1. "the user's different feeding, discharging and other requirements," -> "the users' different feeding, discharging, and other requirements," (plural possessive and serial comma) 2. "Here, there is a dedicated sales manager for your one-on-one scientific selection, and give detailed quotations to ensure the reasonableness and affordability of the user's purchase." -> "Here, there is a dedicated sales manager for your one-on-one scientific selection, and they will give detailed quotations to ensure the reasonableness and affordability of the users' purchase." (subject-verb agreement) 3. "5 Things You Need to Know about Concrete Crusher" -> "5 Things You Need to Know about Concrete Crushers" (plural) 4. "WhatsApp" -> "WhatsApp," (added comma for consistency with other bullet points) 5. "Materials (brochures, catalogs）" -> "Materials (brochures, catalogs)" (changed closing parenthesis to be consistent) 6. "Demand(multiple):" -> "Demand (multiple):" (added space) 7. "WhatsApp:+86 13761974616" -> "WhatsApp: +86 13761974616" (added space after the colon)