Left: Four vertical cut out credit card pockets, two vertical turned edge pockets with full length pocket behind, pen loop.
左：四列信用卡口袋垂直切割，两个垂直转向背后，笔套全长口袋边的口袋。
Using the central control system PLC, intelligent temperature controller and pressure gauge to replace the three pen recorder to realize the closed loop circulation and record of outer temperature.
采用中央控制PLC、智能温控器及压力仪表等替代原进口三针记录仪，实现外温的闭环控制和记录；
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