知识贝壳
知识贝壳
所属栏目：水轮机与水泵专业英语
The casing of a crossflow turbine ismade of structural steel; it is robust, resistantto impacts and frost. If there is high contentsof abrasive material in the water (e.g. sand,silt) or if the actual composition of the wateris considered aggressive (e.g. ......（本文共 353 字 ） [阅读本文] >>