WQ型无过载潜水排污泵双流道叶轮等角螺线叶片型线设计实践
WQ형무과재잠수배오빙쌍류도협륜등각라선협편형선설계실천
Design on the profile of the equal-angle spiral curve blades of model WQ non-over-loading submersible sewage pumps with double- channel impeller
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