grate lever fulcrum是什么意思，grate lever fulcrum的翻译，grate lever fulcrum音标、读音、用法和例句

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grate lever fulcrum是什么意思，grate lever fulcrum的翻译，grate lever fulcrum音标、读音、用法和例句_流逝汉英词典

grate lever fulcrum

基本解释

专业释义

交通運輸工程