The greenhouse is the main facility for growing vegetables in winter in North China.
温室是北方冬季蔬菜生产的主要设施。
The overhead catenary system is the main facility for power supply in electrified railway.
接触网是电气化铁路的主要供电设备。
The overhead catenary system is the main facility for power supply in electrified railway.
接触网是电气化铁路的主要供电设备。
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