Related by context. Frequent words. (Click for all words.) 49 Stationary 46 electrically powered 46 static 45 immobile 41 perpendicularly 41 upright 40 unpowered 40 infrared beam 40 motionless 39 sensor detects 39 northerly direction 39 portable 38 airstream 38 omni directional 38 5mph 38 deformable 38 electro magnetic 38 ultrasonic sensors 38 locomotive cab 37 movable 37 stepper motors 37 battery powered 37 northwesterly direction 37 perpendicular 37 Piezoelectric 37 slewing 37 horizontally 37 linear motors 37 moveable 37 motorized 37 geosynchronous orbit 36 vertically 36 servo motors 36 transportable 36 miniature 36 unmounted 36 counterclockwise 36 inchworm 36 rearmost 36 oscillatory 36 laminar 36 ionize 36 sideways 36 magnetised 36 kinetic energy 35 infrared rays 35 anticlockwise 35 oblique angle 35 oscillating 35 electromagnet 35 electrically driven 35 noiselessly 35 inanimate 35 servomotors 35 monsoon trough 35 infeed 35 convective 35 electric motor 35 passive RFID tags 35 infinitely variable 35 Airships 35 northeastward 35 counter clockwise 35 immobilized 35 infrared laser 35 propulsion 35 vibrating 34 km hr 34 wirelessly transmitted 34 thumbstick 34 rotatable 34 varying distances 34 electromagnets 34 Accelerometers 34 locomotive 34 westerly direction 34 steerable 34 electric motors 34 rotational 34 attachable 34 unmanned 34 soundlessly 34 gantry 34 southerly direction 34 conveyors 34 airborne 34 fore aft 34 magnetic 34 projectiles 34 gyroscopic 34 fork lifts 34 #km h [001] 34 Piezo 34 geostationary 34 retro reflective 34 castors 34 mechanically 34 oncoming 34 piezo 34 horizontal 34 transmitted wirelessly