知识贝壳
知识贝壳
所属栏目：水轮机与水泵专业英语
This is a cylindrical box-like structure provided on the top surface of the runner, asshown in Fig.4.7.Fig.4.7 Head cover of a Francis turbineIts functions are ① to prevent any water leaking through the gap between the guidevanes and the runner from findi ......（本文共 747 字 , 1 张图） [阅读本文] >>