Twyman
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| TWY 170 | Mast dimensions as illustration A. Three point mounted without mast tilt, rake & slew |
| TWY 180 | As illustrations A,B,C & D with mechanical tilt, rake & slew |
| TWY 200 | As illustrations A,B,C & D with hydraulic tilt, rake & slew operated from valve on headstock |
| TWY 250 | As TWY 200 but with 250kg weight & heavy duty headstock |
| TWY 200T | As TWY 200 with 0.4m telescopic extensaion & heavy duty headstock |
| TWY 300P | As TWY 200T with vertical slew 15° up & 15° down, telescopic mast leg |