【第 1 段建议】: 1. "lmpact"应为"Impact"（字母I的拼写错误）。 2. "EPCO"后面的空格应去掉以保持一致性。 3. "Assemblies"在上下文中应为"Assembly"以保持单数形式。 --- 【第 2 段建议】: 1. "1Stone Crusher in Ethiopia" 应改为 "1 Stone Crusher in Ethiopia"（缺少空格）。 2. "and How to Choose the Best?" 应改为 "and How to Choose the Best?"（在‘Best’后应该加上句号，以结束句子）。 3. "Equipments" 应改为 "Equipment"（"Equipment"是不可数名词，不应使用复数形式）。 4. "The River Pebble Stone Crushing Plant mainly consists of..." 中的 "consists of" 后面应加上 "the"（应为 "the River Pebble Stone Crushing Plant mainly consists of the..."）。 5. "impact crusher and hammer crusher are often be compared" 应改为 "impact crusher and hammer crusher are often compared"（去掉 "be"）。 --- 【第 3 段建议】: 1. "importan" should be "important" in the second entry. 2. "there is a shortage of sand and gravel" should be "there are shortages of sand and gravel" for proper pluralization in the seventh entry. 3. "about material blockage in impact crusher" should be "about material blockages in impact crushers" for proper pluralization in the last entry. --- 【第 4 段建议】: 1. "China Aggregates Associat"应为"China Aggregates Association"（缺失一个"ion"）。 2. "low water draft" 应为 "low water absorption"（可能意图为低水吸收率，原文表达不准确）。 3. "soft and weathered particles" 需要用 “soft or weathered particles” 进行更清晰的表述（在中文语法上，这个短语的连接词不恰当）。 4. "WhatsApp" 重复出现。 5. "Materials (brochures, catalogs）" 应改为 "Materials (brochures, catalogs)"，右括号应使用英文格式。 请修改以上错误。