汽机油系统事故排油阀其操作手轮应设在距油箱5m以外的地方。
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目前现场汽车衡多采用什么形式的限位器?如何防止松动?
外出上井两车以上运输放射源时为防止源车出现意外,应该如何行车?
Which statement about Remotely Triggered Black Hole (RTBH) is true?()
A. Route tagging is one of the techniques used by RTBH
B. It is used for BGP authentication
C. It cannot work with static routes
D. It uses extended ACLs for blocking attacks by creating a black hole
E. Before configuring RTBH LDP must be enabled on the interface
焊缝金属主要成分为纯镍的铸铁焊条,其焊条型号为EZNiFe。
A. 正确
B. 错误