Each phase switch may include first and second stationary contacts.
每个相开关包括第一和第二静接点。
The first phase took on a compound economy form and the second, planned economy.
第一个历史阶段是混合经济模式，第二个历史阶段是计划经济模式。
The first phase took on a compound economy form and the second, planned economy.
第一个历史阶段是混合经济模式，第二个历史阶段是计划经济模式。
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