Gusaba ibicuruzwa:
Ikoreshwa mumazi akonje yinganda nimbonezamubano, amazi ashyushye, gushyushya, sisitemu ya gaz ishyushye, sisitemu yo kurwanya umuriro imirasire yizuba hamwe nu miyoboro yoherejwe hagati, nibindi.
Kubahiriza bisanzwe:
| GB / T 19228 YB / T 4204 |
| GB / T 12771 QB / T 2467 |
| JIS G3448 |
| EN 10312-3S |
