Control system of central air conditioner based on PLC
cheng hua-rui ~(1); dong sheng-huai ~(1); xu yu-dang~(2) (1.food engineering department of zhengzhou stockbreeding engineering college; zhengzhou 450008; 2.environment institute of huazhong university of science & technology; wuhan 430074; china)
..............page:54-56
Connectedness in BCH-algebra
li shui-can; liu hong-xing(college of mathmatics and information science; henan university; kaifeng 475001; china)
..............page:31-33
Research development of polymer catalyst
ma xing-ke~(1; 2); su zhi-xing~1; shen wei-guo~1(1.school of chemistry and chemical engineering ; lanzhou university ; lanzhou 730000; 2.department of chemistry; zhoukou teachers college; zhoukou 466000; china)
..............page:66-69
Examination method for qutlier of analytical data
zhao hui~(1); shao su-hua~(2); xie dong-po~(1)(1. chemistry department; zhoukou teachers college; zhoukou 466000; 2.examination center; haolong cooperation ltd of china salt; pingdingshan 467000; china)
..............page:70-71,115
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..............page:98-101
Tissue culture of Yabukita
zhang ya-ting~1; zhang wei~2(1.department of biology engineering ; xinyang agricultural college ; xinyang 464000 ; 2.college of life science ; xingyang normal university ; xinyang 464000; china)
..............page:74-76
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..............page:102-104
A new method of AC voltage measurement
guo rong-yan~(1); chen zhen-zhou~(2); qian lei~(2)(1.physics department of zhoukou teachers college; zhoukou 466000; 2.zhoukou quantity technical director examination test center ; zhoukou 466000; china)
..............page:57-60