求翻译：各工种进行上下立体作业时，不准在同一垂直方向操作，下层作业的范围位置必须在上层作业高度可能坠落的半径范围之外，并设置安全防护棚。是什么意思？

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Three-dimensional operations throughout the various trades are not allowed to operate in the same vertical direction, while the lower class operations location must be in the upper range of operational height may fall beyond the radius of sheds, and set the security.

When about various kinds of work in a factory carry on the three-dimensional work, does not permit in the identical vertical direction operation, the lower level work scope position to have outside the radius scope which the upper formation work highly possibly crashes, and establishes guards agains

The various types of upper and lower solid job, in the same vertical direction operation, lower job location must be in the range of the top working height may fall outside the scope of the RADIUS, and sets security protective canopy.

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