|
| |||||
![]() |
![]() |
||
咨询: CB 1220-2005 921A等钢焊接坡口基本形式及焊缝外形尺寸 Normal forms of welding groove and outside size of welds for 921A steel etc 电话:010-88099016 ; E-mail:zxd711020@hotmail.com gbstandard@hotmail.com chinastandard@hotmail.com ; QQ: |
||
咨询: CB 1220-2005 921A等钢焊接坡口基本形式及焊缝外形尺寸 Normal forms of welding groove and outside size of welds for 921A steel etc 电话:010-88099016 ; E-mail:zxd711020@hotmail.com gbstandard@hotmail.com chinastandard@hotmail.com ; QQ: |
![]() |
||
|
||
京ICP备17046623号-4
|