单词	back shaft
释义	back shaft noun 1 : a countershaft driven by a back gear 2 : any shaft placed at the back of a machine Word History First Known Use 1847, in the meaning defined at sense 1
随便看	boîte boîtes Boötes bp BPA bpap BPB bpd BPE BPh BPharm bpi bpies bpis bpl bpm bpms BPO BPOE BPPV bps bpses BPV BPW Bq

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