所有现场拼接都用美国材料试验协会的A325六角形头螺栓。
All field splices were bolted using ASTM A325 hex head bolts.
首选应用是轴承结构，包括滚珠和轴套。还有，它也能用来做刀具、针形阀、球型止回阀、阀门基座、泵零件、球头螺栓、轴套、抗磨损纺织机械。
In addition, it should be considered for cutlery, needle valves, ball check valves, valve seats, pump parts, ball studs, bushings, and wear-resistant textile components.
我在找一颗六角形头的螺栓。
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