| 摘要 |
<p>A method of controlling the cutting of an object (14) comprising pressurizing a fluid; forming from said pressurized fluid a fluid jet adapted to cut the object (14); and directing the said object-cutting jet towards the object (14), characterised in that, when it is not desired to cut the object, the object-cutting jet is prevented from reaching the object (14), or the object-cutting properties of the jet are impaired, while the pressurisation of the fluid is maintained.</p> |
