concave friction drum
凹面式摩擦卷筒
Tests on the speed ratio of drum cage and friction roller in friction spinning
关于摩擦纺纱尘笼和摩擦辊的速比试验
If the normal space, then check the drum wall and the situation of friction surface.
若间隙正常, 则检查鼓壁与磨擦片表面状况。
Influence of carding, drum and output speed of friction spinning on the strength of yarn
摩擦纺分梳、尘笼和输出速度对成纱强力的影响
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