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tuning fork
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由金属(多为钢)制成的U形声学器件(见图),它能产生频率稳定单纯的纯音,提供频率标准。
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光学、声学
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tuning fork
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pitchfork
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tuning fork
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leaching erosion
leaching flowsheet of mineral material
leaching gold by non-cyanide reagent
leaching mining method
leaching mining microorganisms
leaching ratio
leaching tank
leaching wastewater of tailings and waste dump
leach residue
leach-solution purification of chemical mineral processing
LEAD
lead
lead accumulator
lead acetate
lead acetate; sugar of lead
Lead-acid battery
lead acid battery
lead-acid battery
lead acid storage battery
lead-acid storage battery
lead alkali metal alloy
lead alloys for lead-acid battries
lead and zinc flotation
lead angle method
lead arsenate
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