ring blocking


  • 翻译:环形上盘

同义词

1)ring blocking,环形上盘2)top ring/top block,上方环形转盘/上方块板3)Blocking,ring.,胶环上盘4)upper slitter,(盘形)上刀5)annular pad,环形盘6)annular placenta,环形胎盘

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