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| 文档标题： | 盾支持-线性节 |
| 发布时间： | 2014-04-05 00:00:00 |
| 文档简介： | Shield support is designed for roof support in working space and its protection from broken down rock of goaf, roof control by full caving. The shield support consists of two unit groups shifted in turn: main and auxilliary ones. The main: |