stands for worsted knitting wool; 3 denotes woolen knitting wool; 4 represents a new variety.

the second digit indicates the raw materials used and consists of 1 to 8. 1 stands for domestic wool; 2...

For example, "1175" means woolen yarn made of 7.5 branch yarns of domestic wool. The trademark of wool is a small label tied on the yarn hank, which is generally printed with 3 digits ... ヅヅヅヅヅヅヅヅヅヅヅヅヅヅヅヅヅヅヅヅヅ12