12歯車×12歯車の場合　Gear 12 x Gear 12 drive gear12 driven gear12_share gear12 plate_A gear12 plate_B Joint plate_share handle_share handle pin_share 6歯車×12歯車の場合　Gear 6 x Gear 12 drive gear6 driven gear12_share gear6 plate_A gear6 plate_B Joint plate_share handle_share handle pin_share