Paper friction material is new friction material.It has high frictional factor.Its frictional factor of moving and static are nearer.When it combine, it is meek, stable and wearable.是什么意思_Paper friction material is new friction material.It has high frictional factor.Its frictional factor of moving and static are nearer.When it combine, it is meek, stable and wearable.在線(xiàn)翻譯_英語(yǔ)_讀音_用法_例句