Click “gas explosion” above to subscribe Oh, pay attention to gas explosion, pay attention to gas safety, take precautions, be prepared for danger in times of safety, and contribute to reducing and eliminating gas explosion events! According to the news of Zhejiang satellite TV and Sohu, source: Dingjia gas design Clickâ.

Difference of safety officer ABC Certificate – class a certificate is the main person in charge of the construction enterprise; Class B
