How to correctly handle the leak?

How to correctly handle the leak?
1) When you find a leak, do not panic and quickly close the cylinder angle valve. The company is located in:
2) quickly open the doors and windows, maintain good ventilation, so that liquefied petroleum gas to the outdoor. The company is located in:
3) Do not switch any electrical appliances and use the indoor telephone, put out all open fire. The company is located in:
4) To call the outdoor air supply unit professionals to deal with. The company is located in:
5) Neighbors found liquefied petroleum gas leaks should be knocked on the door, do not use the doorbell
Hubei Daly LPG Cylinder Manufacturer Co., Ltd
Add:1# Yanglinwei Town, Xiantao City, Hubei Province, China
Tel:+86-728-6666606
Ph:+8613872997777
E-mail:Roy@dalycylinder.com