15:19 12-23
[Urê]
15:11 12-23
[Xylene hỗn hợp]
15:11 12-23
[Axit photphoric]
15:09 12-23
[axit sunfuric]
15:07 12-23
[Urê]
15:07 12-23
[axit sunfuric]
15:07 12-23
[Toluen]
15:06 12-23
[axit sunfuric]

