antiparallel spin

paranemic spiral

平行螺旋，反向双股螺旋

Study on Extrusion Modeling of Twin Screw Pulping Extruder Considering Reverse Threads

考虑反向螺旋的双螺杆磨浆机挤压建模

helical curve [ line ]

螺旋曲线螺旋(取向)照相

Approach to the Process of the Discovery of the Structure of DNA Double Helix;

关于DNA双螺旋结构发现过程的再反思

Research on Performance of Dry Gas Seal with Single-row Bidirectional Spiral Grooves

单列双向螺旋槽干气密封的性能研究

a twin-screw cruiser

双螺旋桨的机动游艇.

double torsion machine

双列螺旋弹簧卷绕机

electron-nuclear double resonance helix

电子-核子双共振螺旋管

ectron-nuclear double resonance helix

电子核子双共振螺旋管

double helical (spur) gear

双螺旋齿轮，人字齿轮

spiral part of a screw

（螺钉的）螺旋部分.

Longitudinal Stability of Jet-Propeller Aircraft During Low-Altitude Flight

螺旋桨飞机近地飞行时的纵向稳定性

helical gear with helix angle

带螺旋角的螺旋齿轮

side fire helical antenna

侧向辐射式螺旋形天线

horizontal flow-through coil planet centrifuge for counter current chromatography

水平螺旋管逆流层析仪

HVSS (Horizontal Volute Suspension System)

水平螺旋弹簧悬挂系统

Plane Archimedes spiral antenna

阿基米德平面螺旋天线

Study on Casting Process Numerical Simulation for Grinding Machine of Double Helix Scroll Cover

双螺旋辊式磨浆机螺旋套铸造工艺数值模拟