substation
/ˈsʌbsteɪʃən/noun
1
- a set of equipment reducing the high voltage of electrical power transmission to that suitable for supply to consumers变电设备; 变电所。
2
- a subordinate station for the police or fire service（警局或消防所的）分站; 分所; 分局。
2.1
- N. Amer. a small post office, for example one situated within a larger shop〈北美〉小邮局。