Imperialism in the U.S. Essay ... DBQ 15 Imperialism is the policy of extending the role of authority of a nation over a foreign country, usually in material gain, Military expansion and Economical reasons. In the late 1800âs and early 1900âs, the United States went through an era of imperialism.
Portable gas detector. A gas detector is a device that detects the presence of gases in an area, often as part of a safety system. This type of equipment is used to detect a gas leak or other emissions and can interface with a control system so a process can be automatically shut down.
A gas meter is a specialized flow meter, used to measure the volume of fuel gases such as natural gas and propane.Gas meters are used at residential, commercial, and industrial buildings that consume fuel gas supplied by a gas utility.everal different designs of gas meters are in common use, depending on the volumetric flow rate of gas to be measured, the range of flows anticipated, the type of gas being measured and other factors.