◎ 2-80mm *500-6000mm ◎ 8-20mm *500-4000mm ◎ 8-350mm *500-4000mm

TA0,TA1,TA2,TA3, GR1,GR2,GR3,GR4, BT1-00,BT1-0

GB/T 2965 GB/T 13810 ASTM B348 ASTM F136