Pneumatic marking printer utilizes the air compressor and a pneumatic valve marking on the work piece through controlling the marking head vibration up and down.

气动标记机是利用空气压缩机和一个气阀控制打印头上下振动，在工件上打下标记。

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But the Warriors seized the initiative after seven minutes when Ndlovu chipped the ball perfectly onto the head of Edzai Kasinauyo, marking his return to the team after a three-year absence.

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"Head teachers are very upset about the marking, " he said.

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Arsenal were guilty of criminally poor marking from Malouda's corner, allowing Terry to head across the face of goal for Drogba, left unattended by Alex Song, to score at the far post.

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