- double jack
- doublejack
- twin jack
- 双: two; twin; both; dual
- 塞孔: consent; pin hole; connector ...
- 双塞孔 双手锤 双柱钻架: doublejack
- 塞孔: [电工] consent; pin hole; connector; tip jack; latch; jack; plug socket
- 双塞棒钢包: twin stopper ladle
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