power screen
... piano wire concrete 钢弦混凝土 piano wire screen 琴钢线筛 ; 琴弦筛 Piano wire rods 钢琴用线材 ...
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揭示了琴弦筛面、弹性筛面克服堵孔的机理。
The overcoming blinding mechanism of elastic screen surface was accounted for.
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