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tuo la ji shi yong an quan cao zuo gui ze
Pages: 80
Year: Issue:  7
Journal: Farm Machinery Using & Maintenance

Abstract: 拖拉机技术含量越来越高,对驾驶操作的技术要求也越来越高,只有遵守安全操作规则才能保证农业生产的安全进行,保障农民的生命财产安全.
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