history of hydrogen

{"cid":"91208828","title":"Helium Nitrogen Hydrogen SASPG Turbo Expander 50-50000Nm3\/H","imgUrl":"https:\/\/img.silkroadsl.com\/nimg\/67\/7c\/2e1c8d0d4bab8cbbb7004ec3f2a9-200x200-1.jpg","attrs":{"Price":"Negotiable","Brand Name":"SASPG","Model Number":"Expander","Minimum Order Quantity":"Negotiable","Delivery Time":"8months-18months","Place of Origin":"China","Certification":"ASME\/CE\/GB","Materail":"Stainless steel, Carbon steel, Aluminum","Type":"Cryogenic, Skid Mounted","Condition":"New","Applications":"50~50,000Nm3\/h","Working Medium":"air, nitrogen, natural gas, helium, nitrogen-hydrogen, etc.","Packaging Details":"container, wooden case ,bulk","Payment Terms":"L\/C, T\/T","Supply Ability":"50 Sets \/ Year"}}

{"cid":"91221935","title":"K60 Portable Multi Gas Detector for O2 Co H2s CH4 with Alphasense Sensor City Sensor","imgUrl":"https:\/\/img.silkroadsl.com\/nimg\/6d\/49\/2a221d06a15202451009b4d10eb2-200x200-1.jpg","attrs":{"Minimum Order Quantity":"1PC","Model NO.":"K60","Gas":"O2","Type":"Electrochemical Gas Analyzer","Working Voltage":"3V Lithium Battery","Weight":"300g","Alarm Type":"Vibration Alarm with Light, Sound","Sensor Life":"1 Year for Combustible Gas; 2 Years for Oxygen","Explosion-Proof Grade":"Ex Ib Iic T3 GB","Detection Range":"0-30%Vol","Low Alarm":"18%Vol","High Alarm":"23%Vol","Transport Package":"Carton","Specification":"13.2 x 5.70x 3.8cm","Trademark":"KELISAIKE","Origin":"Nanjing, China","HS Code":"8531100000","Supply Ability":"800PCS Per Month","After-sales Service":"Lifelong Maintenance","Warranty":"1 Year","Brand":"Kelisaike","Customized":"Non-Customized","Portable":"Portable","Certification":"CE","Samples":"US$ 280\/Piece 1 Piece(Min.Order) | Request Sa","Customization":"Available | Customized Request","Stock":"1PC"}}