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[求助] 求助ASME SA-335中一句话

ASME SA-335中14.3
For pipe whose diameter exceeds NPS 25 and whose diameter to wall thickness ratio is 7.0 or less shall be subjected to the bend test instead of the flattening test. Other pipe whose diameter equals or exceeds NPS 10 may be given the bend test in place of the flattening test subject to the approval of the purchaser.

这句话应该怎么理解 外径大于NPS 25 和 外径比壁厚小于等于7应该用弯曲代替压扁。这句话里是满足上述两个条件之一就应该用弯曲代替压扁,还是两个条件同时满足才能用弯曲代替压扁。
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