ASTM A888 imagwiritsidwa ntchito kwambiri ku USA, tili ndi chilolezo cha UPC ndi CISPI301.

ASTM A888 imagwiritsidwa ntchito kwambiri ku USA, tili ndi chilolezo cha UPC ndi CISPI301.Kukula kumayambira 1.5 "-12".——Julayi 20, 2019