definition of derivative

{"title":"Fast Lithium Ion Battery Charger Bike 60V Aluminium Alloy Housing","imgUrl":"https:\/\/img.chinax.com\/nimg\/bf\/56\/2235a3f819593f5132dc499265a9-200x200-1.jpg","attrs":{"Brand Name":"YEWY","Model Number":"UY900","Place of Origin":"GUD, China","Certification":"CE, LVD","Output Current":"2A","Efficiency":"\u226588%","Warranty":"18 Months","Output Voltage":"12V","Dimensions":"222x134x70 Mms","Weight":"2.6 KG","Application":"Lead Acid\/Lifepo4\/Lithium Ion Battery Charger","Input Voltage":"100Vac-120Vac\/ 200Vac-240Vac, 47~63Hz"}}

{"title":"Far Infrared Polyester Man Made Fibre 3D White PSF With Customized Crimp","imgUrl":"https:\/\/img.chinax.com\/nimg\/73\/42\/dc1f5fd77d95b873b43604a17819-200x200-1.jpg","attrs":{"Price":"Negotiable","Brand Name":"Octopus","Model Number":"3D\u00d751MM","Minimum Order Quantity":"Negotiable","Delivery Time":"10~20 Working Days","Certification":"SGS&OEKO&ITS&GRS","Place of Origin":"China","Payment Terms":"L\/C, T\/T","Supply Ability":"5000 Tons Monthly","Packaging Details":"Package: PP bale; Size: About 70cm*110cm*120cm\/Bale; Weight: 300\/320\/350 kg\/Bale; All products can be customized packing according to your requirement; Capacity: 25 ~ 27Tons\/40HQ, 82bales, 9 ~ 10 Tons\/20Gp, 30bales","Name":"Far Infrared Fiber","Fineness":"3 Denier","Grade":"A Grade","Fiber Cut Length":"51mm","Color":"White","Fiber Crimp":"Customized","Application":"Thermal Therapy Clothing, Sports Wear","Industry Standard":"SGS&OEKO&ITS&GRS Certificated","Highlight":"Hydrophobic Polyester Staple Fiber, Water Repellent Fiber"}}

{"title":"5.5V Wire Temperature Sensor","imgUrl":"https:\/\/img.chinax.com\/nimg\/ca\/39\/0df2452a70e691edeb4ab93f46fb-200x200-1.jpg","attrs":{"Price":"$7.00","Brand Name":"iStartek","Model Number":"DS18B20","Minimum Order Quantity":">=5 Pieces","Place of Origin":"Guangdong, China","Supply Ability":"900000 Piece\/Pieces per Day","Packaging Details":"DS18B20 1-Wire Temperature Sensor compatible with car gps trackerNet Weight: 22g","Product name":"1-Wire Temperature Sensor","Type":"Automotive","Model Name":"DS18b20","Power supply":"3.0V~5.5V","Adjustable resolution":"9-12 bits","Wide temperature range":"-55\u2103 ~ +100\u2103","Output leads":"Red(VCC),Yellow(DATA),Black (GND","Stainless steel housing":"3*50mm","Weight":"22g","Length":"Customized","Port":"Shenzhen, Hongkong"}}