In the Southern Hemisphere, where the June solstice is known as the shortest day of the year, it marks the first day of astronomical winter, but the middle of winter in meteorological terms.
Backfill refers to products or materials used to fill excavations. The most common form is composed of a mixture of gypsum and calcium bentonite. Apart from filling holes, one of the primary purposes is to mantle sacrificial anodes under the ground.
How to Do Backfills and Fills for Gel French Manicures. There are two ways to rebalance French gels. One method involves carving out the free edge with an electric file and then applying new product. This method is called a backfill, and can be done with either a French fill diamond bit or a barrel-shape Swiss carbide bit.