A power shovel that is driven by steam.
用蒸汽驱动的动力铲。
In practice use W-4 power shovel often appears troubles, because walking system is frequently used.
在实际使用过程中，w—4电铲的行走机构由于使用频率高，经常出现故障。
An excitation control circuit tor direct current drive system of large power shovel has been designed.
本文设计了大型挖掘机直流传动系统的激磁调节电路。
A control circuit for transition control in DC motor field excitation on large power shovel has been designed.
设计了大型挖掘机械直流电动机激磁电路的转换与控制电路。
A receptacle on various machines such as the scoop of a power shovel or the compartments on a water wheel used to gather and convey material.
斗各种机器上的容器，如铲土机的铲斗，水车的戽斗，用来收集、传送物料。
This article introduces the pollution effect factors of WJD-0.75 power shovel vehicle, and describes the pollution control and precaution measures.
本文详细介绍了污染对WJD- 0 . 75电动铲运机液压系统的影响，并对铲运机污染的预防与控制措施进行了阐述。
The method of producing the teeth of bin in power shovel by vanishing mould casting and the method of operation of water toughening were presented.
介绍了用消失模铸造生产电铲斗齿的工艺方法以及水韧处理的操作要点。
Therefore, the investigation and discussion on power shovel main malfunction cause, diagnose method, maintainance operation is of great significance to improving power shovel efficiency.
因此，探讨电铲常见故障原因、诊断方法、维护操作对提高电铲作业效率有着极为重要的意义。
It is proposed in this paper that a relay regulating loop be added in the hoist current signal of large power shovel so that rational coordination between hoist and crowd capacities can be obtained.
本文提出在大型机械式挖掘机的提升电流信号回路中，增加继电器调节环节的方法求得提升力与推压力的合理匹配。
It is an important factor for the perfect matching between the maximal input power of the hydraulic oil pump and the maximum output power of the engine in the design process of the hydraulic shovel.
液压油泵的最大输入功率与发动机的最大输出功率之间的匹配问题是液压挖掘机设计过程中的一个重要内容。
It is an important factor for the perfect matching between the maximal input power of the hydraulic oil pump and the maximum output power of the engine in the design process of the hydraulic shovel.
液压油泵的最大输入功率与发动机的最大输出功率之间的匹配问题是液压挖掘机设计过程中的一个重要内容。
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