Use security device of hydraulic control valve to ensure the safety.
使用液控单向阀的安全装置，保证安全；
When the pump body with a safety valve, overloading security role.
本泵身带有安全阀，超载时起安全作用。
Pump with its own safety valve, when the overloaded security protection.
泵自己带有平安阀，超载时起平安掩护浸染。
Pump with its own safety valve, when the overloaded security protection.
泵自己带有平安阀，超载时起平安掩护浸染。
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