Inventor
HAN MINGTING
CN2 patents
Patents
2 patentsUS10502038B2Dec 10, 2019
Combined operation method for work modes of walking beam pumping unit
HARBIN SURFICS ELECTRICAL TECH INC0 citations30
US10539129B2Jan 21, 2020
Electric machine driving method and system under non-conventional work mode of oil pumping unit
HARBIN SURFICS ELECTRICAL TECH INC0 citations28