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[毕业设计] [毕业设计]32/5桥式起重机起升机构的设计

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发表于 2013-4-16 11:42:45 | 显示全部楼层
真不错 顶你 加油加油
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发表于 2013-4-17 16:24:25 | 显示全部楼层
Mandako Land Roller was developed in Canada for use in raising peas and edible beans, said distributor Stewart Peterson of West Fargo, N.D. Crop harvests were hindered by small rocks in the field and the big roller was developed to push the rocks into the soil. The latest issue for farmers is ridding fields of corn plant residue in preparation to planting soybeans. The huge rollers are used to flatten the soil surface.
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发表于 2013-4-24 13:58:28 | 显示全部楼层
值得学习啊~~
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发表于 2013-4-24 19:19:55 | 显示全部楼层
多多注意就是了.谢谢.
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