| U20 |
AFNOR |
France |
Carbide for cutting tools |
| U20 |
AFNOR |
France |
Carbide for cutting tools |
| U20080 |
GBT |
China |
China structural steel and alloy steel |
| U20100 |
GBT |
China |
China structural steel and alloy steel |
| U20150 |
GBT |
China |
China structural steel and alloy steel |
| U20082 |
GBT |
China |
China structural steel and alloy steel |
| U20102 |
GBT |
China |
China structural steel and alloy steel |
| U20152 |
GBT |
China |
China structural steel and alloy steel |
| U20202 |
GBT |
China |
China structural steel and alloy steel |
| U20252 |
GBT |
China |
China structural steel and alloy steel |
| U20302 |
GBT |
China |
China structural steel and alloy steel |
| U20352 |
GBT |
China |
China structural steel and alloy steel |
| U20402 |
GBT |
China |
China structural steel and alloy steel |
| U20452 |
GBT |
China |
China structural steel and alloy steel |
| U20502 |
GBT |
China |
China structural steel and alloy steel |
| U20552 |
GBT |
China |
China structural steel and alloy steel |
| U20602 |
GBT |
China |
China structural steel and alloy steel |
| U20652 |
GBT |
China |
China structural steel and alloy steel |
| U20702 |
GBT |
China |
China structural steel and alloy steel |
| U20752 |
GBT |
China |
China structural steel and alloy steel |
