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Yuncheng Ningli Fastener Co., Ltd.
运城市宁力紧固件有限公司
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(GB /T 31.1 - 2013)
促销
material
Carbon steel
grade, rigidity
grade 8.8
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Similar Products
GB /T 31.1 - 1988
GB 31.2 - 1988
GB 31.3 - 1988