double layer rubber sleeve的意思|示意

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双层橡胶套

双层护套 ... 双层磨床：double grinder 双层护套：double layer rubber sleeve 双层高柱廊：double-storey colonnade ...

双层保护 ... differential resistance 差动电阻 double layer rubber sleeve 双层保护 forced centering plate 强制对中盘 ...