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Suzhou Guifeng Precision Stainless Steel Fasteners Factory
苏州市桂丰精密不锈钢紧固件厂
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Stainless steel precious screws
Stainless steel inner hex screws
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(GB /T 68 - 2000)
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grade, rigidity
A2-70
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Similar Products
GB /T 68 - 2016
GB 68 - 1985
DIN 963 - 1990
DIN EN ISO 2009 - 2011