To remove pitch buildup on blades, mix a 50/50 ratio of chainsaw bar chain oil and diesel fuel in a spray bottle and spray onto blade every minute or so. I have heard stories of using an old car windshield cleaner pump to deliver the solution to the blade. It works very well and I have no pitch remaining on the blade.
Coat of arms. A coat of arms is a unique heraldic design on a shield, escutcheon, surcoat, or tabard. A coat of arms is used to cover, protect, and identify the wearer. Thus the term is often stated as coat-armour, because it was anciently displayed on the front of a coat of cloth in European societies.
Heraldry was a design and short saying. Noble families designed a coat of arms that incorporated their heraldry (their design and short saying). They put their coat of arms, showing their heraldry, on banners, shields, tapestries and anything else they could think of. Each part of the coat of arms has a specific meaning. Animals or objects were used to describe character traits-brave as a lion, for example. The colors were used as symbols of character. Each heraldry was unique. There are many books describing what each of the symbols mean. You usually can find such a book at your local library. You can look up your name and see if your family has a coat of arms! Then you'll need to look what each symbol means.