Kei te whakamahia nuitia te ASTM A888 i USA, kei a matou te whakaaetanga UPC me CISPI301.

Kei te whakamahia nuitia te ASTM A888 i USA, kei a matou te whakaaetanga UPC me CISPI301.Ko te rahi mai i te 1.5"-12".——Tiurai 20, 2019