题目内容

离心泵轴承磨损一般与()无关。

A. 对中偏差大
B. 轴弯曲
C. 润滑油质量差
D. 人口压力

查看答案
更多问题

对称三相电源指的是各相电压大小_____,频率______,相位______

单词互译:( )geodeticcontrolpoint:( )地形图:( )constructionmap:( )平面测量:( )高程测量:( )控制点:( )控制网:( )控制测量:( )碎部测量:( )

单词互译:inertialsurveying:( )大地测量,大地测量学:( )geodetic surveying :( )geodetic network:( )矿山测量学:( )工程测量:( )cadastral surveying:( )Topographicsurveying:( )differentialGlobalPositioningSystem(DGPS):( )

单词互译:大地水准面:()horizontal plane:()planeangle:()水平角:()planetrigonometry:()三角测量:()水准测量:()水准仪:()leveling rod/bar/staff:()全站仪:()经纬仪:()

答案查题题库