发布时间:2025-02-03 17:48:39
推拉篷立柱用方管好。
1、方管可以承受较大的压力,适用于搭建大型的推拉篷,比圆管可以更好地固定连接,结构更加牢固,不易晃动。
2、圆管是强度均匀,承受力分散,不易变形,适用于承受压力比较小的情况。
这个罗汉鱼是什么品种啊现在九厘米了也没有起头的感觉啊每天都在喂催起头的饲料温度33度还要多
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