发布时间:2025-01-31 18:07:12
都是预埋坑的尺寸,单位为毫米, 预埋坑的尺寸根据护栏网的高度而不通,1.5米以下的采用500x300x300的,1.5以上400 x400 x400的,2米以上的500X400X400的,
中国果树防冻研究所我是吉林省蛟河市的农民我们这里前年栽了一种果树今年大部分连根都冻死了只剩
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