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厂家直销 gb13681六角焊接螺母 m12圆形内螺纹螺母

gb13681/din929碳钢六角焊接螺母 无角焊接螺帽 点焊螺母m4-m16
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标准编号 gb13681 类别 六角焊接螺母
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gb13681/din929六角焊接螺母六角点焊螺母m4m5m6m8m10m12m14m16

厂家专业生产各种焊接六角螺母m4m5m6m8m10m12 gb /t 13681-1992
厂家直销 gb13681六角焊接螺母 m12圆形内螺纹螺母
gb13681/din929碳钢六角焊接螺母 无角焊接螺帽 点焊螺母m4-m16
标准编号 gb13681 类别 六角焊接螺母
gb13681/din929六角焊接螺母六角点焊螺母m4m5m6m8m10m12m14m16
厂家专业生产各种焊接六角螺母m4m5m6m8m10m12 gb /t 13681-1992