【第 1 段建议】: 1. "Vertical Shaft lmpact Crusher" 应为 "Vertical Shaft Impact Crusher" （"l"应为"I"） 2. "EPCO" 应为 "EPC" 3. "Summary：Natural sand is mainly for" 中的冒号应为英文格式，应使用 "Summary: Natural sand is mainly for" 4. "other" 没有上下文，如为标题或内容不明确，请确认其用途。 请检查并纠正以上问题。 --- 【第 2 段建议】: 1. “manufactured sand：rock”中的冒号应为英文冒号“:”，应改为“manufactured sand: rock”。 2. “less than 4.7MM”中的“MM”需改为小写“mm”。 3. “manufactured sand sand”中的重复“sand”需删除一个。 4. “in urban planning and construction, a large number of construction waste”中的“waste”应改为复数“wastes”，即“a large number of construction wastes”。 5. “the production cost of concrete enterprises can be reduced”应为“the production costs of concrete enterprises can be reduced”，以符合复数形式。 --- 【第 3 段建议】: 1. "The sand making process" should not have a capital "T" in "The." 2. "rarr;" should be replaced with "→". 3. "according to the structure, it can be divided into "plane type sand making" and "tower-like sand making";" - The semicolon should be a comma to match the previous structure. 4. "the loss of fine sand is serious and sufficient water source is needed." - "water source" should be "water sources" for consistency in plurality. 5. "the fine sand has no loss" - This could be rephrased for clarity; "the fine sand is not lost" is preferable. 6. "Get Price More" is awkwardly phrased. Consider revising to "Get More Price Information". Note: Some characters are misformatted (such as `"`) and should be replaced with proper quotation marks (“ ”). --- 【第 4 段建议】: 1. "Materials (brochures, catalogs）" - 括号内的右括号应为英文的右括号“)”而不是中文的“）”。