Isicelo somkhiqizo:
ukwakhiwa kwamabhoyela eziteshi zamandla anamandla aphezulu, amapayipi esitimu ashisa kakhulu, amapayipi amanzi abilayo kanye namapayipi kabhayela esitimela.
Ukuthobela okujwayelekile:
| I-ASTM A249 A688 A803 |
| I-JIS G3463 |
| I-DIN 17457 |
| I-EN 10217-7 |
| I-GB/T 24593 |
| I-NB/T 47019 |
| HG/T 20537.1 |
| I-GB/T 151 |
