1.
Technology Remaking and Energy Research of Double Wheel and Direct Balance Pumping-unit;
双天轮直平式抽油机的方案设计和节能研究
2.
twin wheel twin nozzle type turbine
双轮双喷嘴式水轮机
3.
hyperboloidal gear
双伞齿轮，双曲面齿轮
4.
dual-drum roller
双轮压路机，双轮路碾
5.
twin-input single-output gear
双主动齿轮单出轴齿轮
6.
double helical (spur) gear
双螺旋齿轮，人字齿轮
7.
"Twins, by Jupiter!"
“天哪，双胞胎!”
8.
Double round flatten and two-seater pairs of power polishing machine one.
双轮压平及双座双动力抛光机1台。
9.
a two-wheeled vehicle carrying artillery ammunition.
携带弹药的双轮工具。
10.
double-extraction condensing turbine
双抽气凝气式汽轮机
11.
twin-geared press
双边齿轮驱动压力机
12.
straight-compound cycle
平行双轴(燃气涡轮)循环
13.
counter rotating turbine
正反转双转子涡轮机
14.
external planetary arrangement
外啮双排行星齿轮机构
15.
dual-tandem locked-train gear box
双串联链式减速齿轮箱
16.
double-compound turbo jet
双轴涡轮喷气发动机
17.
the double-geared lifting mechanism of a crane.
起重机的双轮提升装置。
18.
coupe ,animal-drawn
畜拉双座四轮轿式马车