投手则被禁止发人为旋转或轨线的球，例如给球切口或在球上戳刺，也禁止投手用污垢、烟草汁、头油让球变色。

Pitchers were forbidden to give the ball an artificial spin or trajectory by, for instance, nicking it or spitting on it and from discolouring the ball with dirt or tobacco juice or hair grease.

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生产高定量产品的国产水刺生产线还有待于开发和研究。

For the high weight products, the domestic line must be researched and developed in the future.

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目的观察背部腧穴埋线、刺血治疗寻常痤疮的疗效差别。

Conclusion Catgut embedding, pricking bloodletting and fire needling treatments all have a good clinical effect on acne.

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