concept ecological and bio energetic energy class hand hold digital hologram efficiency sign city dark blurred |
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| navigate by keyword : accounting bar business calculator certificate chart class classification colorful communication connection conservation construction consumption data diagram digital eco ecology efficiency energy environment environmental graph green hand hold hologram home house improvement innovation internet label network performance person power rate save showing sign symbol technology |
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| Concept of ecological and bio energetic. Energy class. Hand hold digital hologram energy efficiency sign on city dark blurred background. Model of energy efficiency rate |
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