|
MATERIAL
|
|||
|
|||
|
STANDARD
|
|||
|
ANSI B16.5, HG20619-1997, GB/T9117.1-2000—GB/T9117.4-200, HG20597-1997
|
|
MATERIAL
|
|||
|
|||
|
STANDARD
|
|||
|
ANSI B16.5, HG20619-1997, GB/T9117.1-2000—GB/T9117.4-200, HG20597-1997
|