莺：极北柳莺，翼带可能磨损，没问题。有几只暗色脚的在春季时经过。
Warbler: Arctic, wingbars can wear off no problem. Several dark-legged birds came through in spring.
工作辊磨损后，粗糙度递减导致在较高轧制速度下进料(咬入带卷)时产生滑移。
When work rolls become worn the roughness is diminishing creating slippage in the roll bite at higher speeds.
别盲目信任磨损的扁带绳，它们可能不像建议的那么耐磨。
Do not blindly trust well-worn runner placements they may not be as good as wear and tear suggests.
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