Abstract: Traditional axial-flow pump angle adjustment is achieved by rotating the rigid blades of the impeller to change the blade angle as a whole, thereby regulating the pump’s operating conditions ...
Morning Overview on MSN
'Eruption likely': US's most dangerous volcano stirs near major city
On the flanks of Washington State Mount Rainier, a spike in seismic rumbling has revived an old, unsettling question for the ...
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