英语词汇“STUDY ON BELLEVILLE RING SEAL OF ROLLER BIT”的翻译、意思、用法、释义-英汉汉英双解词典

词汇	STUDY ON BELLEVILLE RING SEAL OF ROLLER BIT
释义	STUDY ON BELLEVILLE RING SEAL OF ROLLER BIT 牙轮钻头碟形圈密封的试验研究
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