[国外标准] DIN 1763-1969 Hexagon Rod of Copper and Copper Wrought Alloys
[国外标准] DIN 1756-1969 Round Rod of Copper and Copper Wrought Alloys
[国外标准] SAE J493-1961 ROD ENDS AND CLEVIS PINS
[国外标准] SAE J1120-1989 SPHERICAL ROD ENDS