发布时间:2025-01-31 12:07:58
这个要看你营养土的成分,正常营养土和黄沙比例为1:1,黄沙主要增加过水性,防止水肥过大引起烂根,营养土如果泥炭土、椰糠等成分过大则要增加黄沙的比例
跨灌溉渠盖板桥盖板跨度6m净高2m宽度4m要求承重100t设计一下基础和盖板厚及配筋
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