Important background and history In a study during the 1970s, the British Steel Industry calculated that hydraulic fluid leakage was costing the industry around 1 Million pounds per year.
Lokufundziwe ngemnyaka wa 2005 eTikweni leTemanti neMahlatsi ase Ningizimu Afrika lokungabekiselwa kutsi ema kg lalishumi nesihlanu seluju ngelibhokisi lokungakhokhwa ngemnyaka munye.