double-pole socket 双极插座
Single-phase Surface-type Flat-and-round Two-pole Socket-outlet 单相两极双用明装插座
Single-phase Flush-type Flat-and-round Two-pole Socket-outlet 单相两极双用暗装插座
surface-mounted three-pole earthed socket 表面安装式三眼接地插座
pole socket
极插座
以上为机器翻译结果，长、整句建议使用 人工翻译 。
The same catalogue included a type of two-pole concentric plug and socket.
相同的目录包括一种两极同心插头和插座。
youdao
The utility model relates to a rotary two-pole flat plug, suitable for a two-hole and three-hole flat jack socket using an AC power supply.
一种可旋转的二极扁插头，适用于交流电源两、三眼扁插孔插座。
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