... 锯齿状地形 serrate topography 锯齿形 serrated form 三氧化铝铁 sesquioxides ...
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serrated form feature 齿形特征
grooved serrated form 清槽齿形
deflection serrated form 变位齿形
end face serrated form 端面齿形
Unlike the flat cylindrical tubes of traditional needles, two serrated shanks form their needle's exterior, while a central shaft slides between.
和平滑的圆柱形传统针头不同，这种针头的外部是两段锯齿条，中空的部分可以在锯齿条之间滑动。
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