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BS EN ISO 898-1:2009 - Mechanical properties of fasteners made of carbon steel and alloy steel. Bolt

Customers who bought this product also bought BS EN 1011-1:2009 Welding. Recommendations for welding of metallic materials General guidance for arc welding BS EN 20898-2:1994, ISO 898-2:1992 Mechanical properties of fasteners Nuts with specified proof ......

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最近好多朋友給我留言,說朋友圈裡面這個「桃子和西瓜不可一起吃」的謠言又開始流行了。       也是啊,又到夏天了嘛。去年這個謠言也傳播過一回,當時還上了排行榜,今年原封不動地又來了!       對如此弱智的謠言,多數網友的態度如下: ...

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