Hydraulic excavator and backhoe loader boom lowering control device . requirements and tests 液压挖掘机和挖掘装载机动臂下降控制装置.性能要求和试验方法
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Earth - moving machinery . hydraulic excavator and backhoe loader boom lowering control device . requirements and tests 土方机械.液压挖掘机和反向铲装载机悬臂降低控制装置.要求和试验
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Earth - moving machinery - hydraulic excavator and backhoe loader boom - lowering control device - requirements and tests 土方机械.降低液压挖土机和反铲装载机声震的控制装置.要求和试验
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Safety of earth - moving machinery - specification for hydraulic excavator and backhoe loader boom lowering control device 运土机械的安全性.液压挖掘机和反铲装载机起重吊杆放下控制装置