関連ワード:  what is propane vs butane    what is better propane or butane    what is hotter propane or butane    what is cheaper propane or butane    what is safer propane or butane    what is heavier propane or butane    what is lpg propane or butane    what is more flammable propane or butane    what is more efficient propane or butane    what is more explosive propane or butane