Ububiko nuwitanga ASTM A249 Tubing

ASTM A249 / A249M - 16a

Inomero yerekana ASTM igaragaza verisiyo idasanzwe ya ASTM.

A249 / A249M - 16a

A = ibyuma bya fer;

249 = yahawe nimero ikurikirana

M = SI ibice

16 = umwaka wo kwakirwa kwambere (cyangwa, mugihe cyo gusubiramo, umwaka wanyuma wanyuma)

a = yerekana isubiramo ryakurikiyeho mumwaka umwe