GB/T23257-2017埋地钢质管道聚乙烯防腐层抗弯曲试验，从试验管段或实际防腐管上截取200x25mm试件，其中200mm为沿管子轴向切割长度。2.5°弯曲模具包括凸模和凹模，凸模曲率半径R=22.43t。
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济南恒瑞金试验机有限公司；山东省计量测试学会力值硬度专业委员
（试验机服务中心）（试验机配件供应中心）（特殊夹具定制中心）
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