【第 1 段建议】: 1. "Vertical Shaft lmpact Crusher" 中的 "l" 应为大写字母 "I"。 2. “SMP Crushing Plant” 前似乎缺少上下文（如“Modular Crushing Plant”旁边）。 3. "EPCO" 应为 "EPC"（假设这是一个错误，因为常见的缩写是EPC而不是EPCO）。 4. “Summary：Gener” 中的冒号应为英文冒号 ":"。 --- 【第 2 段建议】: 1. “whose are” 应改为 “which are” 2. “type” 应改为 “types” 3. “—” 应改为 “—” 4. “Crushing and sand making machine” 应改为 “Crushing and sand making machines” 5. “the process of all kinds of stone material” 应改为 “the process of all kinds of stone materials” 6. “Compare” 应改为 “Compared” 7. “as result of” 应改为 “as a result of” 8. “In the other hand” 应改为 “On the other hand” 9. “which needs certain performance requirements for pebble sand making machine” 应改为 “which need certain performance requirements for the pebble sand making machine” 10. “the pebbles become secondary aggregates materials” 应改为 “the pebbles become secondary aggregate materials” 11. “according to the needs of users” 应改为 “according to users’ needs” 12. “which can not only clean th” 缺少部分内容，应补全句子。 --- 【第 3 段建议】: 1. "operator" should be "the operator" for clarity. 2. "operator should pay" should be "the operator should pay" for consistency. 3. "WhatsApp" should be "WhatsApp:" to maintain formatting. 4. "Materials (brochures, catalogs）" should have the closing parenthesis changed to a standard parenthesis: "Materials (brochures, catalogs)". 5. "Demand(multiple):" should have a space after "Demand": "Demand (multiple):". 6. "WhatsApp:+86 13761974616" should have a space after "WhatsApp:": "WhatsApp: +86 13761974616".