saw-toothed propeller是什么意思，saw-toothed propeller的翻译，saw-toothed propeller音标、读音、用法和例句

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saw-toothed propeller是什么意思，saw-toothed propeller的翻译，saw-toothed propeller音标、读音、用法和例句_2020年的事情英文词典