试卷一 paper one; paperl 考试 examination; test; exam 大学入学考试 college entrance examination; 期末考试 end-of-term examination; final exami...
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The paperl presents the advantages of rolling transportation of portal crane and technical difficulty existed in whole process of rolling transportation.
介绍了港口装卸设备整机滚装运输的优点及门座起重机整机滚装运输中存在的技术难点；
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