可选机型及针位

        SM-1433P:1/4X33N,Normal
        SM-1433PQ:1/4X33N,For normal upper thread,normal and elastic bottom thread.
        SM-1433PQSM:1/4X33N,For smocking,normal upper thread,normal and elastic bottom thread.
        SM-1433PSM:1/4X33N,For smocking
        SM-1433PSSM:1/4X33N,For elastic smocking

        SM-1433PSSM-ET:1/4X33N