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looks like youve done a lot of reading on the subject. Ill look up that article on hyd vehicles asap, one thing I find hard to understand is how big of an I.C.engine/pump combo does it take to make a 500 hp hydraulic motor turn and how fast. (Criticism) No Just stating what I know to be true Hydraulics are Expensive,Heavy,&yes they will eventually leak. Now, what they do have is a hydraulic fluid based on coconuts yes its biodegradeable but I wouldnt drink it . "old hydraulic mens tolls never rust they just get harder to hold on to"
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