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铜与玻璃封焊
释义
铜与玻璃封焊
copper-glass seal
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Helianthus annuus
heliarc unit
heliarc welder
heliarc welding
Heliarc welding
Heliar lens
Heliasteridae
heliation
helicab
helical
helical accelerator
helical aerial
helical angle
helical antenna
helical band
helical-band friction clutch
helical-beam antenna
helical blade
helical blower
helical Bourdon tube
helical casing
helical cast
helical circuit
helical coil
helical compression spring
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