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1500 working hours.
4、液压油粘度一般为 22-46mm2/s。
The viscosity of the hydraulic oil should be 22-46mm2/s.
工作环境温度高用粘度高的液压油，工作环境（温度）低用粘度低的液压油。
High-viscosity hydraulic oil should be used in high temperature working
environment while low-viscosity hydraulic oil should be used in low temperature
environment.
八、工作原理图
VIII. Schematic Diagram