double tapph.
doubleadj.双重的;成双的;两倍的v.翻一番;使 ... 加倍n.两倍;双份
double-point thread chaser叉形螺纹梳刀
double faces mechanical seal双端面机械密封
Double luck bear photo frame幸运熊双联相框
double drawn horse tail hair双齐马尾毛
Double Bishops Teaching Mode双主教学模式
double throw circuit breaker双掷电路断路器
double swing lever mechanism双摆四连杆机构
double-tube heat exchanger套管热交换器
double-bending gastroscope二段弯曲式胃镜