发布时间:2025-01-25 12:10:25
4孔。经查询M15-4锚具M代表锚具(锚具汉语拼音第一个字母);15代表钢绞线的规格为15的钢绞线,4是指孔。锚具是指预应力混凝土中所用的永久性锚固装置,是在后张法结构或构件中,为保持预应力筋的拉力并将其传递到混凝土内部的锚固工具。
合租房每天晚上老婆和她姐穿睡衣看的清清楚楚的她姐妹俩都爱这样穿瞧她姐夫那个熊样老是盯着看
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