And the material certificate must state correct grade or be followed by a data sheet showing the two equivalent grade.
并且材料证书必须表明正确的牌号，或后附一份说明两个等同牌号的材料数据页。
And the material certificate must state correct grade or be followed by a data sheet showing the two equivalent grade.
并且材料证书必须表明正确的牌号，或后附一份说明两个等同牌号的材料数据页。
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