According to the criteria of the subject prakasok the power business. How to make a liquid petroleum gas training. The careful and protective of local personnel responsible for the care of the liquid petroleum gas around 2554 (2011)
As announced by the Department of Energy regarding rules, procedures and training for liquefied petroleum gas. The careful and protection of personnel responsible for the use of liquefied petroleum gas by 2554.
According to the industrial business energy announced on the rules, procedures, training, ก๊าซปิ petroleum liquid. Careful and prevent the danger of specific personnel responsible for the liquefied petroleum gas. The 2554