1) tandem articulated gear

串联式减速齿轮箱
3) tandem articulated gear

串联式减速齿轮
4) tandem articulated type reduction gear

串行联结式减速齿轮
5) nested-type reduction gear

巢式减速齿轮箱
6) articulated reduction gear

联接式减速齿轮
补充资料:串联式空习装药战斗部
[英文]:series shaped-charge warhead