拳卷的，旋卷的卷成线圈样式，其尖端在中间的，如未展开的蕨叶的。
Rolled up in the form of a coil with the tip in the center as an unexpanded fern frond .
拳卷的，旋卷的卷成线圈样式，其尖端在中间的，如未展开的蕨叶的。
Rolled up in the form of a coil with the tip in the center, as an unexpanded fern frond.
某些绝种的头足类动物具有特殊的旋卷形态。
旋切与收卷同步可减少板材重叠、扯断，提高板材的使用率。
The rotary cutting and synchronous rolling can reduce overlapping of plate material and pulling-break and improve the using rate of plate material.
旋切与收卷同步可减少板材重叠、扯断，提高板材的使用率。
The rotary cutting and synchronous rolling can reduce overlapping of plate material and pulling-break and improve the using rate of plate material.
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