发布时间:2025-02-04 04:53:20
底层柱的加密区是1/3柱高是:底层柱根的加密区是1/3柱高。柱根是固定端,使得反弯点较高,塑性铰长度较长,所以有此规定。
急问关于用竹子装修的房间听说时间长了竹子会生虫请问有什么办法可以避免谢谢
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