A kind of helical gear and helical-gear pump of the few tooth of big cornerite
A kind of helical gear and helical-gear pump of the few tooth of big cornerite
- CN 106,837,783 A
- Filed: 02/07/2017
- Published: 06/13/2017
- Est. Priority Date: 02/07/2017
- Status: Active Grant
- EN CH
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- Pin
