steam conduit meaning in English

蒸汽导管
蒸汽管道

The results of calculation and measures show that the low frequency of steam pipelines vibration fastens on 4 . 3 to 4 . 5 hz and 9 . 5hz , the low modes fastens on one - steps curl in vertical plane and its plane of each steam pipeline and one - rotation along with the line connecting the port circling main steam gate and the horizontal port of unit . the modes of # 3 and # 4 main steam conduits occupy the majority of low steps modes ( the five of the first eight phases ) , except for the first phase rotation vibration , the maximal distortion of other low steps vibration modes are all caused by the vibration of erect pipelines of cylinder
计算和实际测量结果表明：导汽管低频振动以4 . 3 - 4 . 5hz 、 9 . 5hz频率为主，管系的低阶模态以各导汽管在垂直导管平面和平面内的一阶弯曲、以及绕主汽门处端点与水平段汽机端连线的一阶扭转为主， # 3 、 # 4导汽管的振动模态占低阶模态的多数(前八阶模态中的五阶) ，除一阶扭转振型，导汽管的其它低阶振动模态中都是进汽缸立管的下端振动变形最大。