Related by context. Frequent words. (Click for all words.) 77 shaft 54 mine shafts 49 axles 49 bushings 48 holes 48 stopes 46 mine shaft 46 flanges 46 irons 46 steel rods 45 putters 45 ventilation shaft 45 clubhead 45 tunnels 45 housings 44 nozzles 44 blades 44 carbide 44 stope 44 motors 43 underground workings 43 propellers 43 gearboxes 43 crankshaft 43 girders 43 tubing 43 pipework 43 pistons 43 downhole 43 tungsten 43 conveyors 43 flange 43 bearings 43 pulleys 43 Shaft 42 fittings 42 piston 42 rotors 42 rods 42 Aldila 42 graphite 42 valves 42 rotor 42 steel girders 42 cavern 41 diameters 41 machined 41 sockets 41 veins 41 hole 41 tubes 41 camshaft 41 clubface 41 cylindrical 41 TaylorMade 41 hydraulic 41 tubular 41 staircases 40 blade 40 titanium 40 conveyor 40 wooden poles 40 alloy 40 manholes 40 mine workings 40 diameter 40 diaphragm 40 tines 40 mines 39 joists 39 pipes 39 radiators 39 mine 39 actuators 39 ductwork 39 cavity 39 trench 39 wedges 39 exhaust pipes 39 connectors 39 boreholes 39 injector 39 underground tunnels 39 adit 39 grooves 39 rivets 39 pneumatic 39 iron 39 conical 39 drill rigs 39 drill holes 39 mm diameter 39 coal seams 39 winches 39 rear wheel 39 passageways 39 holes drilled 39 trusses 39 underground 38 pulley 38 axle