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| What are these? | |
| 摘 要： | 19th-century brace and bit(手摇曲柄钻头) TEA’S UPIn the automatic(自动的)tea-makerof 1904,levers(杠杆),spring(弹簧),and the steam from the kettleactivate stages in the teamakingprocess,A bell is rung to tell you thatthe tea is ready. |
| 本文献已被 CNKI 等数据库收录！ | |