The city hazards have a great effect on the post-earthquake fire ignition and spreading.
在地震的作用下，城市中潜在的危险源对地震次生火灾的起火和蔓延都有着重要的影响。
2
If a cylinder or valve is defective or leaking, remove the cylinder to a remote outdoor location away from possible sources of ignition, and post the area as to the hazard involved.