题目内容

卷绕角的大小，决定了筒子卷绕形式和筒子的结构。当V1不变而V2变小时，卷绕角a也会变（大/小)，因此当V2变得很小时，则使得各层的卷绕成为卷绕;当V1不变而V2变大时，卷绕角a也会变（大/小），因此当V2变大后，则可使得各层的卷绕成为卷绕。而交叉卷绕的筒子有条件卷绕成（无边/有边）筒子。相关计算：已知纱线卷绕到筒子上时的卷绕直径是0.04m,卷绕转速为300转/min,问该点的卷取速度是（m/min）（小数点后留两位）

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