介绍了煤气鼓风机叶轮腐蚀现象，并简单分析了腐蚀原因，还提出了8项改进措施。
Corrosion phenomenon of gas blower impeller is introduced, the corrosive reason is briefly analyzed, and 8 items of improving measures are put forward.
以nsr - 40型罗茨鼓风机的三叶扭叶叶轮为例，详细阐述了这种叶轮型面在车削加工中心的加工方法、工艺和数控编程。
Taking NSR_40 Roots blower as an example, the processing ways, technics and NC program of this twist tri_lobe profile on the lathe machining center is set forth in detail.
本实用新型涉及到离心鼓风机制造领域，是一种风机叶轮倾斜温控焊接台装置。
The utility model relates to a field of centrifugal blower production, in particular to a fan impeller inclined temperature control welding table device.
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