A coupler drive system for pumping unit is developed by using the theory of hydraulic drive of coupler.
A coupler drive system for pumping unit is developed by using the theory of hydraulic drive of coupler.
摘要运用耦合器液力传动原理，研制成功抽油机耦合器传动系统。
A coupler drive system for pumping unit is developed by using the theory of hydraulic drive of coupler.
摘要运用耦合器液力传动原理，研制成功抽油机耦合器传动系统。