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galvanometer
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double head microscope
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retro kerosene lamp
mutoscope
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galvanometer
ellipsoidal
diving helmet
variometer
detector
double head microscope
magnetic compass
radiophone
stroboscope
theodolite
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diving helmet
soldier's helmet
stahlhelm
astronaut helmet
german helmet
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armouring
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combustor
steel helmet
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magnetic compass
galvanometer
bearing compass
compass direction
variometer
mutoscope
hygrometer
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compass
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kilogram
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mars probe
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superconducting
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magnetron
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double head microscope
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micrometer
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kinematograph
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galvanometer
magnetic compass
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hygrometer
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brake mechanism
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pressurizer
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footplate
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watchmaking
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lunar module eagle
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trumpet valve
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aircraft engine
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diving helmet
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photomultiplier
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old calculating machine
micrometer
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magnetic compass
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external flash
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photomultiplier
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