发布时间:2025-02-01 07:41:41
你把桥墩的柱子用纸张折成三角状,这个桥柱子从侧面看应该是个梯形,因为
桥墩的最大承重力就应该是个三角状,柱子最下面接地面的横截面越宽,桥墩的承重力就越大,梯形越高,柱子底下接地面的就要越宽越好,这样做的话,应该就可以了望
格兰仕微波炉47光波炉 g70d20cn1pd2 20l怎么烤红薯
2025-02-01 07:41:41 2025-02-01 07:41:41 2025-02-01 07:41:41 2025-02-01 07:41:41 2025-02-01 07:41:41 2025-02-01 07:41:41 2025-02-01 07:41:41 2025-02-01 07:41:41 2025-02-01 07:41:41 2025-02-01 07:41:41 2025-02-01 07:41:41 2025-02-01 07:41:41 2025-02-01 07:41:41 2025-02-01 07:41:41 2025-02-01 07:41:41 2025-02-01 07:41:41 2025-02-01 07:41:41 2025-02-01 07:41:41 2025-02-01 07:41:41 2025-02-01 07:41:41 2025-02-01 07:41:41 2025-02-01 07:41:41 2025-02-01 07:41:41 2025-02-01 07:41:41 2025-02-01 07:41:41 2025-02-01 07:41:41