乳晕双环切口
Periareola double ring incisions
单叶旋转双曲面
hyperboloid of one sheet of revolution
对转双转子电机
anti-direction dual-rotor motor
反转双转轮
counter-rotating double-rotor
非啮合异向旋转双螺杆挤出机
Non-intermeshing counter-rotating twin screw extruders
啮合型同向旋转双螺杆
intermeshing co -rotating twin -screw
双机抬吊旋转法
two cranes rotary lifting method
双叶旋转双曲面
hyperboloid of two sheets of revolution
同向旋转双螺杆挤出机
Co rotating twin screw extruder
corotating twin-screw extruder