These rolls are corrugated cylinders, usually of the spiral type.

粉碎辊是波纹式滚筒, 还常是螺旋割纹式.

辞典例句

To prove whether or not the fissile spiral type artificial head replacement conforms to biomechanics principles.

目的:论证分体螺旋式人工股骨头置换的合理性.

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