Wave

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{"cid":"256157","pid":"34555242","pimg_url":"\/\/img1.tradegrowthhub.com\/9b\/44\/46d112962aeb\/product\/133801782_s-w400xh400.jpg","name":"Sound wave tube sliding road to calculate wavelength resonance tube resonance frequency teaching demonstration instrument HM-PW015 sound wave sound tube","attrs":{"Price":"Negotiable","MOQ":"300 Pieces","Delivery Time":"Negotiable","Brand":"Huamao Sound wave tube"}}

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