Physics software 1970-01-01
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Pyramorphix 1970-01-01
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Rubik's 360 1970-01-01
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Rubik's Clock 1970-01-01
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Ball detent 1970-01-01
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Bearing pressure 1970-01-01
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Bearing surface 1970-01-01
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Bellcrank 1970-01-01
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Bolt circle 1970-01-01
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Bolted joint 1970-01-01
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Built-up gun 1970-01-01
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Bullwheel 1970-01-01
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Burnishing (metal) 1970-01-01
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Mating connection 1970-01-01
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Mechanical, electrical, and plumbing 1970-01-01
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Mechanical engineering technology 1970-01-01
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Mechanical singularity 1970-01-01
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Metal hose 1970-01-01
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Metalworking 1970-01-01
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Wei Ji Ma 1970-01-01
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