求翻译：基床总厚度为2.5m，其表层厚度为0.6m，底层厚度为1.9m。基床底层的顶部和基床以下填料部位的顶部应设4%的人字排水坡。是什么意思？

The total thickness of the base bed 2.5m, the surface thickness of 0.6m, the bottom thickness of 1.9m. The top and bottom of the base bed base bed the following parts of the filler should be located at the top 4% of the herringbone drainage slope.

Ki-bed total thickness of 2.5 m, and its surface layer thickness of 0.6 m to 1.9 m in thickness. The top and bottom bedding bedding following fill parts at the top of the word should be located 4 % drainage slope.

The foundation-bed total thickness is 2.5m, its surface layer thickness is 0.6m, first floor thickness is 1.9m.The foundation-bed first floor crown and the foundation-bed below padding spot crown should suppose 4% person character weathering.

Total thickness of subgrade bed of 2.5M, its surface layer thickness of 0.6m, the bottom thickness of 1.9m. Top and the bottom layer of subgrade bed following filling part shall be located at the top of 4% miter of weathering.

The total thickness of the base bed is 2.5m, the thickness of its top layer is 0.6m, the thickness of ground floor is 1.9m. The top of the location of packing portion should set up 4% of the people word water drainage slopes under top and base bed of the bed ground floor of the base.