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对于受轴向工作载荷的紧螺栓联接,已知预紧力F0=800N,工作载荷F=1000N,若Kc=4Kb,试计算:螺栓上总的载荷Fa和残余预紧力FR。
江淮丘陵农业区
绝句一共有( )句。
根据《本地通信线路工程设计规范》,交接箱(间)必须设置地线,交接箱(间)地线的接地电阻应不得大于()
火器伤清创术中,对血管伤的处理,不正确的是()
硅酸盐水泥的强度等级时根据()试验测得的3天和28天强度确定的。
历史认识能否检验,如何检验?
关于卡地姆碘敷料使用以下说法正确的是()
下面这个安全标志表示什么意思?圆形,蓝色底上画了一个白色的带着口罩的人头。()
统治过青海河湟地区的政权有( )。
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