发布时间:2025-02-06 12:11:13
楼上的基本正确了.
单个吊环受的是纯拉力,负载能力是看螺纹的大小.两个时受的是拉力和剪应力.而最重要的是剪应力.因为受力区只是螺杆的横截面,比起受拉力的螺纹截面小多了.
家里的水龙头生锈了,想买瓶WD-40除锈剂,这个产品的主要成分是什么啊
2025-02-06 12:11:13 2025-02-06 12:11:13 2025-02-06 12:11:13 2025-02-06 12:11:13 2025-02-06 12:11:13beatsstudio二代耳机 本身是连上手机蓝牙了 不小心给取消匹配 现在怎么弄都连不了怎么办
2025-02-06 12:11:13 2025-02-06 12:11:13 2025-02-06 12:11:13 2025-02-06 12:11:13 2025-02-06 12:11:13 2025-02-06 12:11:13 2025-02-06 12:11:13 2025-02-06 12:11:13 2025-02-06 12:11:13 2025-02-06 12:11:13 2025-02-06 12:11:13 2025-02-06 12:11:13 2025-02-06 12:11:13 2025-02-06 12:11:13 2025-02-06 12:11:13 2025-02-06 12:11:13 2025-02-06 12:11:13 2025-02-06 12:11:13 2025-02-06 12:11:13 2025-02-06 12:11:13太阳能热水器屏幕温度显示正常打不出热水怎么看这两个阀门是开还是关往哪边拧
2025-02-06 12:11:13 2025-02-06 12:11:13 2025-02-06 12:11:13 2025-02-06 12:11:13