As for flat roll of F4 ~ F6 stands, their pre-grinding crowns were optimized and the flatness of strips was greatly improved.
对F4 ~ F6机架平辊的预磨凸度进行优选，明显改善了带钢的平直度。
Batten: One of several flexible strips of wood placed in pockets at the outer edge of a sail to keep it flat.
木条，板条：几块放在船帆外部用以保持船帆平整的柔韧木条。
A flat-end cutter was used, its paths were generated based on the constant scallop height principle and machining strips were enlarged by adjusting inclinati.
提出了一种四坐标联动等残留高度端铣加工任意曲面叶片的方法。
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