standard tower
... standard tooth taper 普通收缩齿 standard tower 标准铁塔 standard toxin 标准毒素 ...
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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。
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.
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