掌握继电一接触式控制设备的控制线路的检修，是职业技能要求的重要环节。
A very important link that vocational skills require is to grasp overhauling the circuit of relay-contact controlled equipment.
对当前大量使用的继电半自动闭塞设备进行了分析，并研究了实现微机半自动闭塞的可行性。
Based on the analysis of the all relay semiautomatic block which are widely used, this paper discusses the feasibility of the semiautomatic block with microcomputer.
对当前大量使用的继电半自动闭塞设备进行了分析，并研究了实现微机半自动闭塞的可行性。
Based on the analysis of the all relay semiautomatic block which are widely used, this paper discusses the feasibility of the semiautomatic block with microcomputer.
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