drafting and revision
起草和修订
以上为机器翻译结果，长、整句建议使用 人工翻译 。
Drafting principle and main contents of trade standard of HR Angle for iron tower have been introduced briefly. Some problems related to standard revision have been discussed.
简要介绍了铁塔用热轧角钢行业标准的制定原则和主要内容，对修订标准时涉及的有关问题进行了解释。
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