Hsinhai Gas used DT-9000 to execute copies the gas table work on past, Due to its parts had stopped production and Hsinhai Gas had renewed OS from Win 98 upto Win XP, therefore they decided to buy new equipment. Based on customer’s request to provide two kinds of machines for the comparison by copies the gas table personnel, so ARK TECH provided two MODEL CASIO IT-800 & CIPHER LAB 9600 for user’s consideration. Hsinhai Gas had used 35 units DT-9000 around 8 years and knew its stability & durability are all very nice. From the using record on maintenance rate, 1st year - 4% , 2nd year - 6%, 3rd & after –8% To develop machine’s function to the acme condition, one good H/W must match with good operation S/W. We invested in S/W development personnel to satisfy user’s requirement,so they adopted S/W modification. Hsinhai are very concerned the durability of keyboard & clarity of screen for copying the gas table, both functions are all strong, so they decided to choose IT-800 finally.