文件名称
大小更新日期
6.77 MB2021-10-18
[国外标准] SAE AMS 5589E-2007 Nickel Alloy, Corrosion and Heat-Resistant, Seamless Tubing 52.5Ni - 19Cr - 3.0Mo
95.99 KB2020-11-30
[国外标准] BS 5589-1989 Code of practice for preservation of timber
1.76 MB2020-11-28
36.13 KB2019-11-26