Hoʻohana nui ʻia ʻo ASTM A888 ma USA, loaʻa iā mākou ka ʻae UPC a me CISPI301.

Hoʻohana nui ʻia ʻo ASTM A888 ma USA, loaʻa iā mākou ka ʻae UPC a me CISPI301.ʻO ka nui mai ka 1.5"-12".——Iulai 20, 2019