At flat the host is quartz diorite with a fine-grained contact phase.
在富来梯，主岩为细粒接触相的石英闪长岩。
The first stationary contact may be connected to a phase of a high-voltage power source.
第一静接点可以与高压电源的一个相连接。
The first stationary contact may be connected to a phase of a high-voltage power source.
第一静接点可以与高压电源的一个相连接。
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