求翻译：5. Bulldozer operations in the steep slopes, it must have special staff to command, is prohibited beyond the slope of the edge of the blade. Soil should be sent to the end of the first reverse gear replaced the blade after the mention of reversing. Multi-machine operations in the same operating area, the difference between before and after the two planes should not be less than 8m, so distance should be larger than 1.5, bulldozers是什么意思？

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