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Grade 11

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Grade 11
Grade 11
16寸无缝钢管,其管表号为SCH40（也就是壁厚为12.7mm）,其材质为ASTM A-53 B级（一种碳钢,化学成分要查ASTM A-53）,带槽,每单位为11.8米
Grade 11 Grade 11 physics~please help me to solve it~thanks grade on grade school grade是什么意思 senior grade "Junior Grade grade中文 GRADE 是什么意思? which grade还是what grade grade school 和grade schools 的区别 Grade 11 physics.anybody can help me~I will appreciate it