To fit correctly measure the width of the window plus 30/40cm (12-16), this will ensure your curtains will comfortably cover your window. Fit your track or pole approximately 15cm (6) above your window recess and centre ensuring you have 15-20cm (6-8) either side of the window.
A keg is a fancy version of your basic barrel. In the factory, a sheet of stainless steel is rolled into a cylinder and welded together. Then, at the cylinder's midpoint, a set of ribs is pressed into it for added rigidity. Next, top and bottom steel plates are stamped out and likewise welded into place.
Next off, the rungs are made of bases. The bases are Adenine, Guanine, Cytosine, and Thymine. The sides are made up of a sugar molecule and a phosphate. Together the base, sugar, and phosphates make up a nucleotide, which is the subunit of DNA. DNA is made up of two complimentary chains of nucleic acids. Each of these complimentary strains has two ends, a 5' end and a 3' end.