The third of Mikhail Mil's current quartet of turbine-powered helicopters, the Mi-8, appeared in prototype form towards the end of 1961.In broad terms it bears the same relationship to the Mi-4 as the Mi-2 has to the Mi-1, and (initially at least) the rotor hub, rotor blades, rear fuselage boom and certain undercarriage components were similar to those employed in the Mi-4.
Fine Gold Recovery Equipment and Black Sand Clean Up Tools This recovery equipment is specifically designed to reduce the amount of raw gold bearing material to a manageable amount for further processing and/or aid directly in the separation of finer grains of gold from heavy black sand concentrates.
The most basic piece of prospecting equipment is the gold pan. Size, color, and shape are really a matter of personal preference. Plastic is light weight, so when you add water, dirt, and gravel to your pan, your arms won't get as tired compared to using a steel pan.