double column surface grinding machine
... 开笔 to start learning as a poet; to write one's first (poem, essay etc) 龙门刨 double column surface grinding machine 马克笔 marker (loanword); felt marker ..
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double column surface grinding machine
双柱平面磨床
以上为机器翻译结果，长、整句建议使用 人工翻译 。