As a Steelworker you are required to operate sheet-metal tools and to apply basic sheet-metal layout techniques. In many Naval Construction Force (NCF) projects, sheet metal is used to protect the exterior of buildings by using flashing, gutters, and at times, complete sheet-metal roofing systems.
Other essential oils have anti-microbial actions, protect against colds and are highly effective for respiratory support, whose essences can be inhaled to address ear, nose, throat and lung problems. These include: 1  Frankincense (Boswella carteri). 2  Lavender (Lavandula augustifolia). 3  Lemon (Citrus limonom).
Heat deactivates garlicâs antimicrobial ingredients. For that reason, itâs best to consume it raw or as a tablet that promises a certain amount of allicin (a key active chemical). Black elderberry (Sambucas nigra) and licorice (Glycyrrhiza glabra) are two other herbs to keep handy during the cold and flu season.