发布时间:2025-02-06 11:58:05
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.
家里装修墙纸选择的是灰色系的就是下图的那种灰色那我软包床背景和窗帘该配什么颜色的呢
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