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).
The following are special concerns for people taking natural remedies for colds or influenza: 1  Echinacea is commonly taken to prevent onset and ease symptoms of colds or flu. 2  High quality studies have failed to show that this herb helps prevent or treat colds. 3  In addition, some people are allergic to echinacea.