M.W of Air=29 M.W of Methane=16 M.W of Propane=44 Methane: 16/29=0.55 Propane: 44/29=1.51 So, Propane > Methane
Leeks are a healthy and common food in Asia, so they are often shown in anime.
Portable propane heaters are dangerous and risky because you have to keep a very good eye on them else they can easily catch fire. They are great if they are used safely.
So as not to mix types in a recovery system and to alert you to the presence of dangerous hydrocarbons like propane.
A rubber diaphragm within the unit vibrates on hot days or when the propane tank is over filled, causing a humming sound and possibly limited gas flow. A humming is probably not going to be dangerous
Welsh leeks may be larger or smaller than leeks grown elsewhere, but leeks are leeks.
That is simply because the pronane appliances are denser than the air. That's why it cannot evaporate. So it stays there. If there's any heat or sparkle around that pronane appliance it can caght on fire. That's why you should be careful or else you know what... BOOOOOOOOOOM!!!
PROPANE FIRE PITS IF USED CORRECTLY ARE NOT DANGEROUS. A GOOD WEBSITE TO TEACH YOU ABOUT THESE WOULD BE http://www.firepits.com/propane-fire-pits/424+4295060302.cfm. THIS SITE SHOWS SEVERAL FIRE PITS.
Leeks are a vegetable related to onions.
daffodils reprsent Wales so do leeks
Propane weighs 4.4 lbs per gallon, so 20 lbs of propane 4.54 gallons.
While leeks could potentially be used in the sales of fast food, it seems unlikely. Leeks are similar to onions, which are cheap and easy to prep. Leeks are more expensive, and require extensive preparation and washing, so it is unlikely that we will see their use in fast food anytime soon.