[国外标准] ASTM B861-19 Standard Specif i cation for Titanium and Titanium Alloy Seamless Pipe
[国外标准] ASTM B861-09 钛和钛合金的无缝钢管
[国外标准] ASTM B861-06 钛和钛合金的无缝钢管
[国外标准] ASTM B861-03 钛和钛合金的无缝钢管