单词：graphite bearing
graphite bearing的用法和样例：
例句
- The brittle nature of graphite also precludes the use of thin components for reducing stack size and weight, which is particularly important for transportation applications.目前最常用的双极板是无孔石墨板，加工复杂，且石墨基质较脆，厚度难于进一步变薄，重量难以减轻。
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