screw with straight-line knurls

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1.	直线滚花头螺钉 1 2 3 4 5 ... 圆头螺钉^ screw with round head 直线滚花头螺钉^ screw with straight-line knurls 活动扳手^ screw wrench ... www.swmfanyi.com
2.	直线滚花螺钉海洋航海及海运... ... screw with square head 方头螺钉 screw with straight-line knurls 直线滚花螺钉 screw wrench 活络扳手 ... www.chuguo.cn

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