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Circle 15 Heating Element

Electrical Equipment & Supplies/Electric Heating Equipment/Medium Frequency Power Supplies

3

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Circle 23 Heating Pad

Chemicals/Chemical Intermediates/Intermediate Compounds

3。5

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Round 26 Ceramic Heating Plate

Construction & Building Materials/Construction Ceramics/Other Architectural Ceramics

5.5

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Round 40 Heating Pad

Chemicals/Chemical Intermediates/Intermediate Compounds

6

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