怎么样才能听到楼下的声音,用听诊器好像不行啊,有什么便宜的仪器吗
2025-02-02 18:27:54 2025-02-02 18:27:54 2025-02-02 18:27:54计算出来楼梯板的配筋是810平台板中计算的结果是6478140到了配筋图里面感觉小了一半新手求指导
2025-02-02 18:27:54 2025-02-02 18:27:54 2025-02-02 18:27:54 2025-02-02 18:27:54 2025-02-02 18:27:54 2025-02-02 18:27:54 2025-02-02 18:27:54 2025-02-02 18:27:54 2025-02-02 18:27:54 2025-02-02 18:27:54 2025-02-02 18:27:54 2025-02-02 18:27:54 2025-02-02 18:27:54 2025-02-02 18:27:54 2025-02-02 18:27:54 2025-02-02 18:27:54 2025-02-02 18:27:54 2025-02-02 18:27:54 2025-02-02 18:27:54 2025-02-02 18:27:54 2025-02-02 18:27:54 2025-02-02 18:27:54 2025-02-02 18:27:54 2025-02-02 18:27:54 2025-02-02 18:27:54 2025-02-02 18:27:54 2025-02-02 18:27:54 2025-02-02 18:27:54 2025-02-02 18:27:54