Dhuumaha birta aan lahayn

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Codsiga alaabta:
Alaabooyinka waxaa si weyn loogu isticmaalaa kiimikada, batroolka, warqad-sameynta, tamarta, injineernimada bullaacadaha iyo warshadaha kale.
U hoggaansanaanta caadiga ah:

ASTM A312 A778 A789 A358 A790 A268 A269 A289 A409 A731 A791 A814 A928

GB/T 12771 GB/T 21832

EN 10217-7

JIS G3459 JIS G3468 JIS G3448

HG20537.1-4

EN 10357