| 工程设计理论、方法与技术 |
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| 门座起重机的一种新型变幅系统及其设计方法 |
| 李勇智, 陈定方 |
| 武汉理工大学 物流工程学院, 湖北 武汉 430063 |
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| New luffing system of portal crane and its design method |
| LI Yong-Zhi, CHEN Ding-Fang |
| College of Logistics, Wuhan University of Technology, Wuhan 430063, China |
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