BJ-DS and BJ-DK half coupling(Joint) Type list:
BJ75DS，BJ95DS，BJ125DS，BJ150DS，BJ175DS，BJ200DS，BJ225DS，BJ250DS，BJ300DS
BJ75DK，BJ95DK，BJ125DK，BJ150DK，BJ175DK，BJ200DK，BJ225DK，BJ250DK，BJ300DK
