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Blade for rotary-type lawn mowers
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Apparatus for detecting discontinuities in ferrous materials
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Apparatus for detecting discontinuities in ferrous metals
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Mobile crane
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Mobile crane
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Float valve
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Railway-track liner
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Optical apparatus for instructional purposes
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Method of and apparatus for polishing
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Optical instrument
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Method and means of mounting lenses
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Movement-magnifying mechanism of gauges and like measuring instruments
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Belt fastener
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Method of and means for preparing lenses and the like for grinding and polishing
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Method of and appliance for polishing glass and the like substances
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Grinding and polishing apparatus
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Grinding machine
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Grinding machine
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Grinding machine
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Polishing machine
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