片语
cast iron seal ring铸铁密封环
iron clamp ring铁夹环
iron boiler ring锅炉角铁环
ductile iron piston ring球墨铸铁活塞环
cast iron piston ring铸铁活塞环
angle-iron boiler ring锅炉角铁环
plated iron screw ring镀紫铜铁吊环螺钉
copper-plated iron screw ring镀紫铜铁吊环螺钉
metal line液面线;钢线,铁圈;玻膏面
nodular iron piston ring球墨铸铁活塞环