..............page:6-8,13
..............page:73-76,82
A method of synthesis of aromotic lsocyanates
feng gui rong 1; zhang hui ru 2 (1.department of chemistry; tangshan normal college; tangshan hebei 063000; china; 2.no.26 middle; school of tangshan; tangshan hebei 063009; china)
..............page:65-67
The synthesis of n-butyl lactate
cui guang hua 1; dong gui ying 2 (1.department of chemical enhineering; hebei institute of technology; tangshan hebei 063000; china; 2 tangshan san you co.lt.; tangshan hebei 063305; china)
..............page:55-57
..............page:43-45,50
..............page:58-61,67
..............page:25-28,42
..............page:83-86,98