washboard

Say, put washboard top of head, two arms are smooth extend, double leg is diverged.

说罢, 将洗衣板放在头顶, 两臂平伸, 双腿叉开.

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Regulation be production caused by the improper paperboard foaming washboard or radio frequent.

往往会因为生产调节不当而造成纸板表面呈搓板状或起泡.

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