- 塞孔: consent; pin hole; connector ...
- 环: ring; hoop
- 孔环: a ular ring; annular ring; annulus; anulus; gyroma; halo; orifice ring; pore ring
- 塞孔: [电工] consent; pin hole; connector; tip jack; latch; jack; plug socket
- 多孔环: perforated ring
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