Ntchito yamalonda:
amagwiritsidwa ntchito kwambiri mu makina, zida zamankhwala, zida zolimbitsa thupi, Qizheng, masitima othamanga kwambiri, magalimoto, mipando, zokongoletsera ndi zina.
Kutsatira kwanthawi zonse:
| Chithunzi cha ASTM A554 |
| GB/T 12770 |
| Chithunzi cha JIS G3446 |
| JG/T 3030 |
| YB/T 5363 |
