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1.Research on Relationship between Wall Thickness of Bed with W-shaped Spacing Piece and Vibrating Mode
W型隔板床身壁厚与振型关系的研究收藏指正
2.a metal sheathing of uniform thickness (such as the shield attached to an artillery piece to protect the gunners).
金属做的一种厚度均匀的罩子（如大炮上保护炮手的挡板）。收藏指正
3.Cutting current adjusted from 10A to maximum continuously for different work piece, different thickness and different cutting speed, good cutting surface.
切割电流从10A到最大输出电流连续可调，可满足不同工件材料、厚度和切割速度的要求，切口美观.收藏指正
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