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.
Protect Your Home and Hands. To help ward off seasonal illnesses, use a diffuser with essential oils blends known for their antimicrobial properties, such as eucalyptus and myrrh or tea tree oil and lavender.
1 Massage both the back and chest with a blend of 5-6 drops each of Eucalyptus radiata, Fir, Lemon, or one of the respiratory blends (Aspire, Breezy, Mariah or Stefanie) in a teaspoon of your favorite carrier oil.  Throughout the flu season, youâll want to diffuse respiratory essential oils every day for prevention. Try Tea Tree, Eucalyptus radiata, any of the 4 respiratory blends (Aspire, Breezy, Mariah and Stefanie) or Deliverance.