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Brown cobalt-free three-point humidity indicator card manufacturers set/make 3.30% 40% 50% humidity sensitive color change card700+ monthly purchasefrom 268 som/monthот 2,237 sum
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Long-term production of PCB dedicated humidity display card environmental protection cobalt-free humidity sensitive card can be customized200+ monthly purchasefrom 402 som/monthот 3,355 sum
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