旋转屏蔽塞旋塞 rotating shield plug rotating plug

[单选题]The machine has stopped rotating because the bearing _____ the shaft.A．seizedB．cloggedC．meltedD．inserted

[单选题]The machine has stopped rotating because the bearing （） the shaft.A . seizedB . cloggedC . meltedD . inserted

[单选题]Rotating flyweights acting against spring pressure make a simple type of （）.A . governorB . safety valveC . reducing valveD . feed water regulator

[单选题]High-speed rotating in a centrifugal purifier can produce a force （） larger than the force of gravity.A . many thousand timesB . between timesC . one timeD . at time

[名词解释] 屏蔽发热 shield heating

[单选题]顶驱手动上旋塞累计旋转时间达到（）强制报废。A . 2000小时B . 1500小时C . 1000小时D . 800小时

[单选题]高压旋塞阀旋转（）手轮就能达到全开或全关的目的。A .90°B .120°C .150°D .180°

[单选题]屏蔽泵旋转方向不正确会引起（）.A .轴承损坏B .振动大C .异响D .流量不足

[单选题]proxy plug-in的作用是? ()A． 使得web server提供静态内容服务B． 使得weblogic提供动态内容服务C． 负载均衡请求 D. 以上所有

[单选题]下旋塞、箭形止回阀、投入式止回阀、浮阀累计旋转时间达到（）强制报废。A . 2000小时B . 1500小时C . 1000小时D . 800小时