Tetracycline has been studied extensively in clinical trials, with thousands of people worldwide having been evaluated. In these studies, side effects occurring in a group of people taking the drug were documented and compared to the side effects that occurred in a similar group of people not taking the medicine.
Steel ties are utilised in nearly all sectors of the worldwide railroad systems including heavy-haul, class 1s, regional, shortlines, mining, electrified passenger lines (OHLE) and all manner of industries.
Railroad Board is a smooth, thin, bristol-type board, colored on both sides, that is used for signs, posters, mailing cards, tickets, tags, and so forth. Each sheet is coated on both sides with bright colors or white. Thicknesses are 4 ply (0.014) and 6 ply (0.020).