Blade according to claim 20, characterised in that each shrunk-on ring (65, 68) has a cylindrical peripheral journal (66, 69) constituted by a ceramic lining of great hardness.
刀片根据索赔20，特点是在每个缩水-关于环(65,68)有一个圆筒形周边日报(66,69)所构成的陶瓷内衬伟大的硬度。
Blade according to claim 20, characterised in that each shrunk-on ring (65, 68) has a cylindrical peripheral journal (66, 69) constituted by a ceramic lining of great hardness.
刀片根据索赔20，特点是在每个缩水-关于环(65,68)有一个圆筒形周边日报(66,69)所构成的陶瓷内衬伟大的硬度。
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