什么是材料强度设计值

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select * from tbl_Articles WHERE ArticleID=253319 LIMIT 0,1
select * from tbl_Articles_data WHERE ArticleID=253319 LIMIT 0,1
select * from tbl_Articles_sphinx where id=253319 LIMIT 0,1
SELECT ArticleID,Title FROM tbl_Articles WHERE ArticleID IN(1051435,1076452,1106274,1072290,1072901,1100115,1077976,1075859,1080171,1072683,1071203,1073399,1097245,1093483,1066018,1090699,1102298,1077525,1064061,1102250,1080695,1078076,1102076,1056514,1086418,1078983,1111930,1092886,1096256,1072268) ORDER BY field (ArticleID,1051435,1076452,1106274,1072290,1072901,1100115,1077976,1075859,1080171,1072683,1071203,1073399,1097245,1093483,1066018,1090699,1102298,1077525,1064061,1102250,1080695,1078076,1102076,1056514,1086418,1078983,1111930,1092886,1096256,1072268)