TCVN 2025-1977 Cylindrical helical compression(tension)springs of Ⅱ class and of 2 category made of round steel Main parameters of coils《圆钢制II级和2类圆柱螺旋压缩(拉伸)弹簧 线圈的主要参数》.pdf

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TCVN 2025-1977 Cylindrical helical compression(tension)springs of Ⅱ class and of 2 category made of round steel Main parameters of coils《圆钢制II级和2类圆柱螺旋压缩(拉伸)弹簧 线圈的主要参数》.pdf_第1页
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