UV/IR探头状态显示IR报警表示() ["A、电源、探头电源连线有问题","B、在检测范围内有UV射线源","C、在检测范围内有IR射线源","D、探头通讯电路COM2有问题"]
确定加工余量方法() ["A、测量法","B、询问法","C、计算法","D、估计法","E、修正法"]
油泵房内发生火灾,应先切断()切断来油并停止油泵运转,在扑救火灾。 ["电源","阀门","压力表","真空表"]
处于备用状态的消防水泵,其入口管路的阀门平时应处于()状态。 ["无开关要求","关闭","半开启","全开启"]
编制机械加工工艺规程步骤包括() ["A、零件图分析","B、确定毛坯","C、确定刀具","D、确定公差","E、确定用途"]
为什么储矿仓要轮换使用?