 | LW-6/LW-7/LW-8 | Earliest domestic manufacture to develop
Quick, convenient and common to connect to all kinds of tractors’ hitches. |
|  | SW-6/SW-7 | Earliest domestic manufacture to develop
Quick, convenient and common to connect to all kinds of tractors’ hitches. |
|  | CW-6/CW-7 | Earliest domestic manufacture to develop
Quick, convenient and common to connect to all kinds of tractors’ hitches. |
|  | YW-6 | Earliest domestic manufacture to develop
Quick, convenient and common to connect to all kinds of tractors’ hitches. |
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