The invention relates to the field of seamless steel pipe production methods, in particular to a seamless steel pipe hammering and reducing technology.
本发明涉及无缝钢管的制造方法领域，尤其是一种无缝钢管锤击减径工 艺。
Paint pipe clamps gold, and secure towooden board by hammering a nail through the small holes in the pipe clamp.
用涂料把管夹子刷成金色，用锤子和钉子把管夹固定在木板上（钉子钉在管夹上方的小孔里）。
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