- backward part
- 零件: part; element; detail; compo ...
- 插: stick in; insert
- 反: reverse side
- 放大器插反: amplifier card
- 零件: [工业] part; element; detail; component; finding; section; spare part; spare; fitting; ancillary◇零件盒 workbin; 零件库 parts library; 零件箱 tote-box
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